1880   -0.1493
1881   -0.0985
1882   -0.1169
1883   -0.1667
1884   -0.2272
1885   -0.2008
1886   -0.1803
1887   -0.2577
1888   -0.1754
1889   -0.0931
1890   -0.3064
1891   -0.2656
1892   -0.3034
1893   -0.3379
1894   -0.3009
1895   -0.2482
1896   -0.1026
1897   -0.1424
1898   -0.2732
1899   -0.1544
1900   -0.1098
1901   -0.1684
1902   -0.2576
1903   -0.3478
1904   -0.4088
1905   -0.2877
1906   -0.2375
1907   -0.3802
1908   -0.4261
1909   -0.4281
1910   -0.4100
1911   -0.4340
1912   -0.3789
1913   -0.3467
1914   -0.1860
1915   -0.1086
1916   -0.3067
1917   -0.3423
1918   -0.2359
1919   -0.2562
1920   -0.2331
1921   -0.1625
1922   -0.2483
1923   -0.2272
1924   -0.2232
1925   -0.1540
1926   -0.0580
1927   -0.1236
1928   -0.1268
1929   -0.2459
1930   -0.0561
1931   -0.0352
1932   -0.0544
1933   -0.1958
1934   -0.0528
1935   -0.0833
1936   -0.0564
1937    0.0572
1938    0.0877
1939    0.0725
1940    0.1151
1941    0.1625
1942    0.1186
1943    0.1141
1944    0.2177
1945    0.0917
1946   -0.0441
1947   -0.0469
1948   -0.0584
1949   -0.0690
1950   -0.1597
1951   -0.0013
1952    0.0403
1953    0.1168
1954   -0.0979
1955   -0.1156
1956   -0.1760
1957    0.0631
1958    0.1144
1959    0.0719
1960    0.0218
1961    0.0961
1962    0.1225
1963    0.1404
1964   -0.1228
1965   -0.0573
1966    0.0019
1967    0.0174
1968    0.0049
1969    0.1097
1970    0.0638
1971   -0.0353
1972    0.0525
1973    0.1876
1974   -0.0555
1975    0.0146
1976   -0.0771
1977    0.1754
1978    0.0951
1979    0.1826
1980    0.2268
1981    0.2669
1982    0.1490
1983    0.3148
1984    0.1239
1985    0.1052
1986    0.1948
1987    0.3268
1988    0.3378
1989    0.2610
1990    0.3956
1991    0.3738
1992    0.2329
1993    0.2617
1994    0.3221
1995    0.4457
1996    0.3167
1997    0.5123
1998    0.6287
1999    0.4504
2000    0.4244
2001    0.5474
2002    0.6078
2003    0.6188
2004    0.5752
2005    0.6485
2006    0.5953
2007    0.5873
2008    0.5091
2009    0.5939
2010    0.6567
2011    0.5336
2012    0.5752