1780 NA
1781 NA
1782 NA
1783 NA
1784 NA
1785 NA
1786 NA
1787 NA
1788 NA
1789 NA
1790 NA
1791 NA
1792 NA
1793 NA
1794 NA
1795 NA
1796 NA
1797 NA
1798 NA
1799 NA
1800 NA
1801 NA
1802 NA
1803 NA
1804 NA
1805 NA
1806 NA
1807 NA
1808 NA
1809 NA
1810 NA
1811 NA
1812 NA
1813 NA
1814 NA
1815 NA
1816 NA
1817 0.540412805318447
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1946 0.507342821101285
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1957 0.348461151206404
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1967 0.274539178649566
1968 0.545119632251092
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1977 0.314101279469097
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1980 1.26512822749699
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1983 1.66243020675352
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1988 1.5653600053032
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1999 0.775146970431113
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2011 0.763476544504143
2012 0.144550913976319
2013 0.0339010113550861
2014 -1.70182637608328
2015 -0.962170836944163
2016 -0.538049439925429
2017 NA
2018 NA
2019 NA
2020 NA
2021 NA
