1969    -999    -999    -999    -999   -59.1   -65.6   -67.0   -68.1   -68.8   -62.6   -57.5   -46.5
1970   -47.1   -47.4   -51.5   -54.9   -60.0   -63.0   -70.1   -72.7   -71.6   -64.4   -48.1   -45.4
1971   -43.7   -45.6   -50.8   -54.4   -62.8   -63.7   -68.8   -69.3   -69.8   -65.1   -50.3   -46.9
1972   -45.9   -46.7   -51.1   -54.7   -61.3   -67.7   -73.3   -67.6   -64.7   -63.2   -48.4   -45.1
1973   -43.3   -45.5   -49.5   -54.4   -61.3   -66.4   -70.6   -70.8   -72.7   -59.6   -55.0   -43.6
1974   -44.9   -48.4   -50.3   -55.0   -61.3   -67.0   -72.4   -76.0   -70.3   -62.5   -57.6   -46.6
1975   -45.9   -46.1   -49.6   -53.8   -60.3   -63.7   -70.3   -75.5   -71.5   -55.4   -55.6   -46.4
1976   -44.0   -47.3   -50.4   -54.8   -59.7   -68.4   -70.5   -71.7   -70.9   -67.5   -54.8   -45.7
1977   -45.2   -47.4   -51.0   -55.9   -59.7   -67.7   -67.9   -73.0   -73.0   -68.5   -50.9   -46.4
1978   -44.3   -46.8   -49.8   -52.5   -60.6   -67.0   -70.8   -72.1   -69.4   -58.4   -49.3   -44.7
1979   -45.9   -46.3   -51.5   -55.3   -60.3   -65.9   -70.1   -74.4   -76.4   -64.0   -50.7   -44.9
1980   -44.6   -45.1   -50.5   -54.8   -57.9    -999   -68.0   -72.9   -73.8   -66.1   -58.5   -44.8
1981   -44.3   -45.6   -51.2   -55.9   -57.8   -65.7   -71.6   -73.2   -74.8   -66.6   -54.3   -45.5
1982   -45.7   -45.6   -50.6   -54.2   -58.3   -68.0   -68.3   -73.3   -73.9   -64.7   -53.0   -46.8
1983   -44.3   -45.3   -49.2   -54.7   -59.7   -67.3   -69.8   -73.1   -72.4   -62.7   -51.4   -45.2
1984   -45.1   -46.5   -52.9   -54.8   -62.0   -66.1   -69.4   -71.6   -72.4   -70.4   -51.1   -47.7
1985   -45.6   -46.6   -49.5   -52.9   -60.5   -64.5   -67.0   -69.1   -67.8   -63.9   -54.2   -43.9
1986   -45.2   -46.4   -50.5   -55.2   -61.0   -66.0   -69.7   -67.6   -69.3   -61.1   -53.2   -43.9
1987   -43.8   -47.1   -49.5   -54.1   -59.3   -66.3   -70.1   -71.1   -73.5   -68.3   -57.8   -50.5
1988   -44.1   -46.1   -49.9   -53.8   -58.2   -65.9   -70.6   -73.1   -69.8   -67.2   -50.7   -42.2
1989   -43.6   -46.6   -49.9   -53.9   -59.2   -64.1   -63.5    -999    -999   -70.6   -45.6   -47.1
1990   -45.6   -47.3   -50.2   -54.3   -62.4   -66.4   -69.7   -69.8   -73.2   -62.1   -58.9   -55.5
1991   -44.8   -44.9   -50.6   -55.7   -60.3   -67.3   -69.5   -73.6   -74.3   -72.6   -50.0   -44.2
1992   -44.7   -45.6   -50.3   -54.8   -60.3   -68.3   -67.2   -70.9   -71.2   -64.7   -53.4   -51.1
1993   -46.0   -47.6   -50.5   -56.0   -59.6   -63.8   -68.0   -70.8   -69.0   -69.6   -62.5   -44.0
1994   -47.1   -47.2   -51.0   -56.9   -59.2   -66.3   -69.3   -71.5   -74.0   -71.1   -66.0   -41.7
1995   -46.2   -47.8   -51.0   -56.1   -58.1   -61.5   -70.2   -70.8   -71.8   -64.8   -60.8   -49.5
1996   -45.1   -47.5   -51.2   -56.3   -61.3   -66.4   -67.8   -72.2   -72.5   -62.2   -63.0    -999
1997    -999    -999    -999    -999    -999    -999    -999    -999    -999    -999   -51.5   -46.2
1998   -46.4   -48.8   -51.4   -56.3   -62.8   -67.7   -71.1   -73.8   -73.1   -69.2   -55.2   -50.5
1999   -46.6    -999    -999    -999    -999    -999    -999    -999    -999    -999    -999    -999