Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
---|---|---|---|---|---|---|---|---|---|---|---|---|
1980 | - | - | - | 33.6(100) | 31.3(100) | 30.7(100) | 30.6(100) | 32.0(100) | 18.6(100) | 33.4(100) | 16.8(100) | 15.2(100) |
1981 | 21.5(100) | 18.8(100) | 40.3(100) | 23.4(100) | 25.5(100) | 27.9(100) | 24.4(100) | 13.9(100) | 26.5(100) | 30.0(100) | 25.9(100) | 26.6(100) |
1982 | 18.3(100) | 20.8(100) | 27.9(100) | 14.5(100) | 23.4(100) | 32.7(100) | 27.8(100) | 31.4(100) | 26.0(100) | 19.1(100) | 27.3(100) | 15.4(100) |
1983 | 15.6(100) | 15.8(100) | 34.7(100) | 42.6(100) | 35.0(100) | 24.8(100) | 19.1(100) | 27.4(100) | 20.8(100) | 37.1(100) | 26.2(100) | 20.5(100) |
1984 | 14.4(100) | 23.7(100) | 22.9(100) | 22.8(100) | 30.6(100) | 35.5(100) | 23.0(100) | 19.5(100) | 21.0(100) | 23.3(100) | 18.1(100) | 17.9(100) |
1985 | 22.2(100) | 20.8(100) | 26.5(100) | 26.3(100) | 29.5(100) | 22.8(100) | 18.3(100) | 20.5(100) | 19.5(100) | 27.9(100) | 19.8(100) | 18.3(100) |
1986 | 21.2(100) | 20.8(100) | 22.2(100) | 22.5(100) | 32.2(100) | 20.7(100) | 22.4(100) | 20.0(100) | 22.5(100) | 29.8(100) | 21.2(100) | 25.8(100) |
1987 | 16.7(100) | 17.2(100) | 19.0(100) | 28.8(100) | 29.4(100) | 26.8(100) | 27.4(100) | 28.1(100) | 26.8(100) | 17.3(100) | 15.6(100) | 20.1(100) |
1988 | 22.7(100) | 14.4(100) | 23.2(100) | 38.2(100) | 25.5(100) | 28.1(100) | 28.1(100) | 32.8(100) | 21.1(100) | 24.8(100) | 29.6(100) | 24.8(100) |
1989 | 26.3(100) | 21.2(100) | 28.2(100) | 33.3(100) | 27.6(100) | 23.4(100) | 24.0(100) | 25.5(100) | 24.8(100) | 25.0(100) | 28.3(100) | 23.6(100) |
1990 | 21.4(100) | 21.5(100) | - | - | - | - | - | - | - | - | - | - |
1991 | - | - | - | - | - | - | - | - | - | - | - | - |
1992 | - | - | - | - | - | - | - | - | - | - | - | - |
1993 | - | - | - | - | - | - | - | - | - | - | - | - |
1994 | - | - | - | - | - | - | - | - | - | - | - | - |
1995 | - | - | - | - | - | - | - | - | - | - | - | - |
1996 | - | - | - | - | - | - | - | - | - | - | - | - |
1997 | - | - | - | - | - | - | - | - | - | - | - | - |
1998 | - | - | - | - | - | - | - | - | - | - | - | - |
1999 | - | - | - | - | - | - | - | - | - | - | - | - |
2000 | - | - | - | - | - | - | - | - | - | - | - | - |
2001 | - | - | - | - | - | - | - | - | - | - | - | - |
2002 | - | - | - | - | - | - | - | - | - | - | - | - |
2003 | - | - | - | - | - | - | - | - | - | - | - | - |
2004 | - | - | - | - | - | - | - | - | - | - | - | - |
2005 | - | - | - | - | - | - | - | - | - | - | - | - |
2006 | - | - | - | - | - | - | - | - | - | - | - | - |
2007 | - | - | - | - | - | - | - | - | - | - | - | - |
2008 | - | - | - | - | - | - | - | - | - | - | - | - |
2009 | - | - | - | - | - | - | - | - | - | - | - | - |