Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
---|---|---|---|---|---|---|---|---|---|---|---|---|
1971 | - | - | 17.9(100) | 18.2(100) | 14.9(100) | 14.9(100) | 21.5(100) | 17.3(100) | 15.6(100) | 16.2(100) | 15.0(100) | 18.5(100) |
1972 | 24.3(100) | 17.4(100) | 18.2(100) | 21.1(100) | 14.8(100) | 16.3(100) | 19.1(100) | 13.5(100) | 17.7(100) | 12.5(100) | 13.7(100) | 23.6(100) |
1973 | 17.3(100) | 14.8(100) | 13.3(100) | 17.6(100) | 14.3(100) | 19.9(100) | 17.7(100) | 15.7(100) | 12.7(100) | 13.3(100) | 17.0(100) | 9.5(100) |
1974 | 12.0(100) | 13.6(100) | 15.1(100) | 16.4(100) | 13.2(100) | 15.8(100) | 10.6(100) | 19.4(100) | 20.0(100) | 11.3(100) | 15.7(100) | 13.5(100) |
1975 | 13.1(100) | 14.9(100) | 15.9(100) | 17.4(100) | 11.5(100) | 14.1(100) | 11.7(100) | 18.7(100) | 16.4(100) | 11.9(100) | 19.7(100) | 11.6(100) |
1976 | 19.4(100) | 16.7(100) | 17.3(100) | 18.1(100) | 20.0(100) | 21.6(100) | 22.5(100) | 14.9(100) | 15.0(100) | 14.3(100) | 11.6(100) | 15.6(100) |
1977 | 13.1(100) | 19.6(100) | 17.9(100) | 19.9(100) | 11.9(100) | 16.3(100) | 12.3(100) | 17.8(100) | 21.7(100) | 17.9(100) | 17.2(100) | 16.3(100) |
1978 | 18.0(100) | 20.3(100) | 20.0(100) | 23.7(100) | 13.0(100) | 12.2(100) | 16.4(100) | 17.7(100) | 16.6(100) | 17.2(100) | 19.1(100) | 14.0(100) |
1979 | 20.0(100) | 19.7(100) | 17.7(100) | 17.1(100) | 17.7(100) | 17.5(100) | 16.4(100) | 13.9(100) | 20.1(100) | 15.6(100) | 19.7(100) | 18.9(100) |
1980 | 12.2(100) | 16.5(100) | 22.3(100) | 17.1(100) | 17.3(100) | 15.3(100) | 11.4(100) | 16.1(100) | 18.8(100) | 14.8(100) | 20.8(100) | 13.9(100) |
1981 | 15.3(100) | 18.5(100) | 19.8(100) | 15.4(100) | 16.1(100) | 13.0(100) | 14.8(100) | 17.9(100) | 19.6(100) | 17.5(100) | 13.1(100) | 13.9(100) |
1982 | 12.3(100) | 11.8(100) | 15.1(100) | 20.4(100) | 18.6(100) | 14.5(100) | 15.3(100) | 15.5(100) | 19.9(100) | 15.0(100) | 12.6(100) | 13.3(100) |
1983 | 19.4(100) | 21.1(100) | 19.2(100) | 16.3(100) | 14.1(100) | 13.6(100) | 14.7(100) | 12.7(100) | 19.9(100) | 14.5(100) | 13.8(100) | 18.2(100) |
1984 | 12.3(100) | 18.2(100) | 15.0(100) | 15.7(100) | 8.9(100) | 12.3(100) | 13.3(100) | 14.2(100) | 18.8(100) | 15.5(100) | 13.1(100) | 16.0(100) |
1985 | 10.2(100) | 16.2(100) | 15.2(100) | 13.8(100) | 16.4(100) | 12.6(100) | 18.5(100) | 14.6(100) | 14.6(100) | 12.8(100) | 13.1(100) | 15.2(100) |
1986 | 14.1(100) | 13.2(100) | 22.7(100) | 18.4(100) | 15.7(100) | 23.1(100) | 16.5(100) | 15.6(100) | 18.8(100) | 13.1(100) | 11.9(100) | 11.9(100) |
1987 | 16.3(100) | 15.6(100) | 21.4(100) | 16.6(100) | 21.9(100) | 15.8(100) | 21.1(100) | 18.5(100) | 15.8(100) | 13.7(100) | 16.0(100) | 12.5(100) |
1988 | 16.6(100) | 14.3(100) | 19.8(100) | 15.7(100) | 18.3(100) | 14.9(100) | 17.1(100) | 17.1(100) | 77.5(100) | 17.6(100) | 13.8(100) | 14.5(100) |
1989 | 10.4(100) | 13.0(100) | 18.2(100) | 17.2(100) | 12.9(100) | 17.3(100) | 16.7(100) | 14.4(100) | 18.3(100) | 15.7(100) | 12.9(100) | 14.5(100) |
1990 | 15.2(100) | 16.6(100) | 17.2(100) | 16.7(100) | 21.2(100) | 15.0(100) | 13.2(100) | 13.0(100) | 18.2(100) | 11.2(100) | 14.0(100) | 9.5(100) |
1991 | 13.6(100) | 12.6( 96) | - | - | - | - | - | - | - | - | - | - |
1992 | - | - | - | - | - | - | - | - | - | - | - | - |
1993 | - | - | - | - | - | - | - | - | - | - | - | - |
1994 | - | - | - | - | - | - | - | - | - | - | - | - |
1995 | - | - | - | - | - | - | - | - | - | - | - | - |
1996 | - | - | - | - | - | - | - | - | - | - | - | - |
1997 | - | - | - | - | - | - | - | - | - | - | - | - |
1998 | - | - | - | - | - | - | - | - | - | - | - | - |
1999 | - | - | - | - | - | - | - | - | - | - | - | - |
2000 | - | - | - | - | - | - | - | - | - | - | - | - |
2001 | - | - | - | - | - | - | - | - | - | - | - | - |
2002 | - | - | - | - | - | - | - | - | - | - | - | - |
2003 | - | - | - | - | - | - | - | - | - | - | - | - |
2004 | - | - | - | - | - | - | - | - | - | - | - | - |
2005 | - | - | - | - | - | - | - | - | - | - | - | - |
2006 | - | - | - | - | - | - | - | - | - | - | - | - |
2007 | - | - | - | - | - | - | - | - | - | - | - | - |
2008 | - | - | 14.8( 19) | 4.2( 97) | 7.8(100) | 5.4( 97) | 5.2( 97) | 6.8(100) | 7.8( 93) | 9.6( 84) | 5.9( 90) | 6.6(100) |
2009 | 7.3( 90) | - | - | - | - | - | - | - | - | - | - | - |