1950 2023 1950 -2.188 -1.446 -0.965 -0.859 -0.634 -0.581 -0.742 -0.549 -0.602 0.119 -0.257 -0.493 1951 -0.479 -0.414 -0.570 -0.561 -1.071 -1.435 -1.104 -1.175 -1.420 -1.069 -1.012 -1.225 1952 -1.335 -1.091 -0.670 -0.434 -0.627 -0.973 -1.336 -0.897 -0.583 -0.258 -0.316 0.845 1953 0.944 0.748 1.217 1.250 1.271 1.057 1.041 0.619 0.291 1.082 2.050 1.419 1954 1.094 1.157 0.079 -0.373 -0.164 0.178 -0.035 -0.132 -0.263 0.184 0.355 0.404 1955 0.326 -0.249 -0.216 0.041 0.261 -0.016 -0.088 0.275 -0.110 -0.524 -0.080 -0.518 1956 0.120 -0.138 0.023 -0.038 0.142 0.471 0.464 0.540 0.301 -0.052 -0.226 -0.767 1957 -1.272 -1.959 -1.339 -1.255 -1.038 -1.168 -0.756 -0.905 -0.922 -1.029 -1.407 -0.717 1958 0.117 0.147 -1.152 -0.719 -0.851 -0.723 -0.870 -0.629 -0.204 -0.509 -0.775 -0.405 1959 0.123 -0.591 -0.392 -0.451 -0.438 -0.373 -0.396 -0.504 0.073 0.134 -0.048 0.423 1960 1.016 0.819 0.863 0.793 0.919 0.313 0.709 0.438 0.524 0.489 0.953 1.136 1961 1.103 1.359 1.749 0.957 1.400 1.202 1.063 1.075 0.773 0.349 0.221 0.397 1962 0.175 -0.150 -0.608 -0.471 -0.739 -0.304 -0.062 -0.371 0.334 0.164 0.446 0.465 1963 -0.813 -0.280 -1.097 -0.811 -0.428 -0.716 -0.367 -0.135 0.120 0.507 0.661 0.541 1964 1.073 0.292 0.352 0.250 0.272 0.884 1.604 0.782 0.913 0.713 0.074 -0.679 1965 -0.609 -0.838 -0.943 -0.879 -1.159 -0.830 -0.692 -0.444 -0.857 -0.683 -0.918 -1.194 1966 -0.323 -1.114 -0.599 -1.369 -1.679 -1.264 -1.114 -0.978 -0.753 -0.800 -0.938 -0.545 1967 -0.736 -0.610 -1.119 -0.891 -0.995 -1.252 -1.173 -0.754 -0.052 0.007 -0.588 -0.233 1968 -0.766 -0.626 -0.632 -1.158 -1.259 -1.038 -1.021 -0.960 -0.915 -0.738 -0.225 -0.869 1969 -2.559 -0.737 -0.733 -0.183 -0.091 -0.776 -0.731 -0.232 0.015 0.290 -0.041 1.127 1970 -0.192 -0.321 -0.413 -0.222 0.484 0.371 0.272 0.413 0.399 0.226 -0.214 -0.072 1971 -0.202 0.060 0.454 0.854 0.495 0.413 0.791 0.706 0.528 0.331 0.182 -0.028 1972 -0.531 -0.408 -0.694 -0.681 -0.747 -0.761 -0.322 -0.427 -0.925 -1.095 -0.556 -0.762 1973 -0.048 -0.503 -0.072 -0.051 0.255 0.514 0.324 0.167 0.357 0.350 -0.113 0.339 1974 -1.003 -0.386 -0.026 0.015 -0.166 0.219 0.377 0.262 -0.168 0.007 0.043 0.716 1975 0.639 0.985 0.716 0.649 0.716 0.458 0.511 1.026 0.573 0.956 1.274 1.079 1976 1.078 1.183 1.680 2.436 2.181 2.067 2.267 2.436 2.432 1.693 1.575 1.330 1977 1.322 1.934 1.699 1.396 1.072 0.924 1.037 1.285 0.766 1.253 1.449 0.854 1978 1.215 1.245 0.616 0.453 0.587 0.384 0.426 0.864 1.286 0.352 -0.259 -1.115 1979 -0.515 -0.233 -0.629 -1.034 -0.782 -0.823 -1.148 -1.251 -0.785 -0.613 -0.492 -0.541 1980 -1.903 -1.722 -1.151 -0.066 -0.211 -0.683 -0.990 -1.083 -0.697 -0.066 -0.135 -0.283 1981 -0.264 -1.058 -0.691 -0.627 0.200 0.009 -0.526 -0.698 0.003 -0.288 0.756 0.521 1982 -0.200 -0.873 -0.621 -1.071 -0.993 -0.848 -0.611 -0.457 -0.460 -1.007 -0.866 -0.234 1983 0.605 0.474 0.430 -0.721 -0.744 -0.077 -0.049 -0.010 -0.410 -0.487 0.561 -0.678 1984 -0.215 0.401 0.719 1.160 0.982 0.737 0.416 0.368 0.823 0.943 0.862 0.252 1985 0.324 -0.065 0.231 0.319 0.156 -0.045 0.178 -0.233 -0.936 -1.183 -1.794 -1.681 1986 -0.769 -1.449 -0.466 -0.967 -0.498 -0.666 -0.941 -1.018 -0.768 -0.294 -0.501 -0.456 1987 0.687 0.768 0.285 0.471 0.274 0.394 0.426 0.340 0.170 0.121 0.522 0.692 1988 1.105 0.797 0.968 1.573 1.778 1.743 1.725 1.393 1.316 1.487 1.243 0.755 1989 1.313 0.662 0.929 0.784 0.584 0.522 1.264 0.667 0.654 0.442 -0.301 -0.173 1990 0.269 -0.280 0.653 0.242 -0.096 -0.065 -0.258 -0.330 -0.159 -0.120 -0.739 -1.533 1991 -0.744 -0.305 -0.807 -0.206 -0.060 -0.388 -0.479 -0.574 -0.949 -1.090 -0.172 -0.213 1992 0.493 -0.457 -0.821 -1.434 -1.796 -1.351 -1.462 -1.247 -0.947 -0.969 -1.281 -1.869 1993 -2.817 -2.141 -1.742 -0.759 -1.089 -1.682 -1.679 -1.514 -2.047 -2.354 -2.999 -2.001 1994 -1.854 -1.979 -1.856 -1.447 -0.301 -0.612 -0.711 -0.859 -1.105 -1.111 -1.688 -1.017 1995 -0.499 -1.561 -2.055 -1.825 -1.504 -1.048 -1.499 -1.006 -0.894 -0.518 -0.277 0.216 1996 -0.639 -1.053 -1.149 -0.436 -1.275 -1.060 -0.884 -0.748 -0.934 -1.041 -1.100 -1.355 1997 -1.640 -1.113 -0.618 -0.506 -0.877 -0.938 -0.772 -0.786 -0.481 -0.594 0.174 0.261 1998 0.528 1.900 0.893 0.522 0.278 0.119 0.393 0.273 0.044 0.099 0.717 0.769 1999 1.083 2.304 1.974 1.646 1.605 1.905 1.381 1.433 1.305 1.179 1.321 1.053 2000 1.405 2.124 2.149 2.365 2.220 2.102 1.656 1.352 1.380 1.698 2.015 2.165 2001 2.862 2.956 2.389 2.204 1.954 2.349 1.500 1.915 1.893 1.162 1.765 2.019 2002 1.864 2.177 1.898 0.897 1.103 1.605 1.382 0.812 0.824 0.824 1.659 2.637 2003 1.969 0.993 1.491 1.102 0.919 0.778 1.202 0.782 0.869 1.287 -0.114 0.224 2004 0.265 0.667 0.383 0.125 0.207 0.776 0.412 0.685 0.376 0.043 -0.442 -0.985 2005 -1.658 -1.494 -1.486 -1.686 -0.790 -1.284 -1.664 -1.131 -1.573 -0.889 -1.661 -1.253 2006 -0.647 -1.070 -0.710 -0.566 -0.122 -0.128 -0.499 -0.367 -0.340 -1.049 -0.996 -0.155 2007 -0.412 -0.137 -0.549 0.261 0.691 1.232 1.229 1.440 0.909 1.268 0.728 0.458 2008 0.556 1.136 1.374 1.396 1.738 1.279 1.428 2.144 2.227 1.766 1.970 0.449 2009 0.722 0.909 0.331 0.416 0.555 0.370 0.561 0.718 0.984 1.154 1.055 1.063 2010 2.063 1.839 1.653 1.179 1.866 1.238 1.146 1.078 1.004 1.606 0.988 0.779 2011 0.322 0.550 1.203 0.596 1.395 1.113 1.035 1.036 1.328 1.204 0.374 0.132 2012 0.834 0.863 1.117 1.926 1.627 1.938 1.860 1.730 1.358 1.867 1.402 1.200 2013 1.231 1.204 0.643 0.476 0.852 0.727 0.451 0.562 0.390 -0.147 -0.805 -1.452 2014 -0.390 -0.267 -0.453 -0.617 0.228 -0.416 -0.133 -0.545 -0.777 0.425 0.311 -0.355 2015 -0.550 -1.273 -1.395 -1.378 -0.720 -1.249 -1.474 -1.928 -2.104 1.307 -2.254 -1.106 2016 0.938 0.229 0.472 -0.400 -0.682 -0.958 -0.487 -0.538 -0.774 0.352 1.159 -1.541 2017 -0.267 -0.671 -0.895 -0.113 -0.458 -0.295 -0.445 -0.531 -0.526 -1.410 -2.058 -2.685 2018 -1.485 -2.233 -2.043 -2.059 -1.922 -1.812 -1.398 -1.876 -2.267 -2.558 -2.091 -1.966 2019 -.8641 -2.561 -1.992 -2.165 -1.857 -2.354 -2.161 -2.055 -2.520 -2.577 -3.371 -2.542 2020 -1.520 -2.322 -1.834 -1.872 -1.360 -1.778 -1.840 -1.203 -1.249 -1.477 -2.828 -1.812 2021 -0.534 -1.203 -0.763 -1.885 -0.740 -0.264 -0.523 -0.707 -0.741 -0.343 -0.265 -2.084 2022 -1.407 -2.094 -1.104 -0.640 -0.408 -0.672 -0.482 -0.635 -0.891 -1.905 -2.467 -2.954 2023 -1.688 -2.243 -2.782 -1.949 -1.293 -1.609 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 NPGO index data from website http://www.o3d.org/npgo/npgo.php this version obtained at NOAA/PSL updated Aug 2023