1880   -0.1611
1881   -0.1081
1882   -0.1238
1883   -0.1754
1884   -0.2362
1885   -0.2080
1886   -0.1872
1887   -0.2616
1888   -0.1784
1889   -0.0993
1890   -0.3118
1891   -0.2787
1892   -0.3159
1893   -0.3514
1894   -0.3111
1895   -0.2506
1896   -0.1087
1897   -0.1500
1898   -0.2778
1899   -0.1602
1900   -0.1149
1901   -0.1747
1902   -0.2633
1903   -0.3518
1904   -0.4144
1905   -0.2933
1906   -0.2413
1907   -0.3844
1908   -0.4314
1909   -0.4368
1910   -0.4184
1911   -0.4388
1912   -0.3839
1913   -0.3523
1914   -0.1914
1915   -0.1126
1916   -0.3114
1917   -0.3446
1918   -0.2372
1919   -0.2555
1920   -0.2345
1921   -0.1645
1922   -0.2546
1923   -0.2334
1924   -0.2280
1925   -0.1578
1926   -0.0614
1927   -0.1276
1928   -0.1292
1929   -0.2492
1930   -0.0594
1931   -0.0332
1932   -0.0544
1933   -0.1956
1934   -0.0510
1935   -0.0815
1936   -0.0547
1937    0.0577
1938    0.0873
1939    0.0721
1940    0.1167
1941    0.1647
1942    0.1225
1943    0.1148
1944    0.2227
1945    0.0932
1946   -0.0400
1947   -0.0406
1948   -0.0535
1949   -0.0684
1950   -0.1582
1951   -0.0019
1952    0.0403
1953    0.1159
1954   -0.0983
1955   -0.1149
1956   -0.1744
1957    0.0679
1958    0.1186
1959    0.0752
1960    0.0261
1961    0.1021
1962    0.1285
1963    0.1465
1964   -0.1188
1965   -0.0535
1966    0.0049
1967    0.0209
1968    0.0085
1969    0.1134
1970    0.0676
1971   -0.0323
1972    0.0552
1973    0.1901
1974   -0.0536
1975    0.0160
1976   -0.0770
1977    0.1755
1978    0.0966
1979    0.1835
1980    0.2277
1981    0.2678
1982    0.1489
1983    0.3140
1984    0.1240
1985    0.1068
1986    0.1960
1987    0.3288
1988    0.3403
1989    0.2643
1990    0.3974
1991    0.3734
1992    0.2313
1993    0.2622
1994    0.3244
1995    0.4466
1996    0.3163
1997    0.5101
1998    0.6289
1999    0.4528
2000    0.4260
2001    0.5486
2002    0.6107
2003    0.6190
2004    0.5746
2005    0.6482
2006    0.5920
2007    0.5861
2008    0.5069
2009    0.5902
2010    0.6516
2011    0.5303
2012 -999.0000