Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
---|---|---|---|---|---|---|---|---|---|---|---|---|
1956 | 13.6 | 14.6 | 12.9 | 12.7 | 11.3 | 10.3 | 10.1 | 9.0 | 10.4 | 10.3 | 13.0 | 14.2 |
1957 | 15.1 | 15.0 | 13.6 | 11.5 | 10.4 | 10.7 | 10.1 | 9.6 | 8.8 | 10.4 | 10.0 | 13.3 |
1958 | 13.9 | 14.6 | 14.4 | 12.2 | 11.6 | 11.0 | 9.0 | 9.6 | 10.1 | 11.0 | 11.6 | 14.0 |
1959 | 14.6 | 16.2 | 14.5 | 12.0 | 10.8 | 10.6 | 9.2 | 9.9 | 9.1 | 10.3 | 11.4 | 14.2 |
1960 | 14.5 | 14.7 | 12.4 | 14.5 | 13.3 | 10.7 | 9.7 | 9.7 | 10.0 | 9.7 | 12.7 | 14.2 |
1961 | 14.7 | 14.1 | 15.0 | 13.4 | 11.7 | 10.5 | 9.6 | 9.1 | 8.3 | 9.4 | 12.3 | 13.7 |
1962 | 14.5 | 15.8 | 14.8 | 12.6 | 11.9 | 8.3 | 8.9 | 8.2 | 8.5 | 9.4 | 11.7 | 13.5 |
1963 | 13.5 | 14.3 | 13.3 | 13.6 | 11.6 | 9.9 | 8.5 | 8.2 | 7.1 | 9.3 | 10.7 | 11.7 |
1964 | 13.5 | 12.1 | 13.4 | 11.8 | 10.0 | 9.0 | 7.3 | 8.6 | 8.3 | 8.8 | 12.3 | 13.1 |
1965 | 13.9 | 13.3 | 12.4 | 12.6 | 10.8 | 9.2 | 9.2 | 7.8 | 9.0 | 11.0 | 11.7 | 12.3 |
1966 | 13.3 | 15.7 | 12.6 | 11.6 | 11.1 | 10.4 | 9.1 | 8.5 | 9.8 | 10.4 | 11.0 | 12.1 |
1967 | 12.7 | 14.3 | 13.4 | 12.3 | 10.5 | 9.0 | 8.0 | 7.9 | 9.3 | 9.7 | 10.4 | 12.8 |
1968 | 14.3 | 16.4 | 14.2 | 13.0 | 12.8 | 10.6 | 8.4 | 8.1 | 9.6 | 9.0 | 11.1 | 12.3 |
1969 | 13.2 | 13.1 | 13.6 | 11.8 | 12.0 | 8.9 | 9.4 | 8.7 | 9.6 | 10.8 | 11.3 | 12.9 |
1970 | 13.9 | 14.2 | 13.6 | 13.3 | 10.3 | 9.5 | 8.7 | 9.8 | 8.9 | 10.5 | 11.9 | 13.1 |
1971 | 14.0 | 14.0 | 12.7 | 12.8 | 10.9 | 9.3 | 9.1 | 9.2 | 9.2 | 10.1 | 12.3 | 14.5 |
1972 | 13.1 | 14.0 | 13.6 | 11.8 | 10.8 | 10.5 | 9.7 | 8.9 | 10.0 | 10.7 | 11.7 | 11.2 |
1973 | 12.6 | 14.1 | 12.8 | 12.1 | 11.1 | 9.7 | 8.1 | 8.9 | 8.7 | 10.0 | 13.2 | 14.1 |
1974 | 14.7 | 15.5 | 14.6 | 14.1 | 12.0 | 9.5 | 8.9 | 9.3 | - | 10.2 | 12.1 | 13.1 |
1975 | 15.3 | 15.7 | 14.3 | 13.1 | 10.8 | 10.2 | 9.4 | 10.1 | 9.0 | 9.6 | 14.7 | 14.1 |
1976 | 14.8 | 14.1 | 14.4 | 13.3 | 11.4 | 10.5 | 10.0 | 9.6 | 8.8 | 10.6 | 12.0 | 13.1 |
1977 | 13.6 | 13.2 | 15.2 | 12.8 | 11.4 | 10.1 | 8.5 | 8.0 | 10.1 | 9.7 | 11.8 | 12.3 |
1978 | 14.6 | 13.8 | 12.6 | 13.5 | 11.5 | 11.1 | 9.6 | 8.6 | 8.8 | 9.9 | 13.1 | 13.3 |
1979 | 14.4 | 14.9 | 13.2 | 13.0 | 15.5 | 8.3 | 9.6 | 8.5 | 10.0 | 10.6 | 12.9 | 13.4 |
1980 | 15.5 | 15.4 | 14.2 | 12.0 | 10.3 | 9.9 | 9.5 | 8.9 | 10.3 | 11.0 | 12.0 | 13.6 |
1981 | 14.8 | 15.2 | 15.9 | 12.1 | 10.6 | 10.7 | 8.8 | 9.8 | 9.5 | 10.7 | 11.2 | 14.1 |
1982 | 14.7 | 15.4 | 15.1 | 14.3 | 10.7 | 9.8 | 10.6 | 10.0 | 9.2 | 11.3 | 12.4 | 11.9 |
1983 | 12.6 | 14.3 | 15.1 | 13.2 | 10.1 | 9.6 | 9.2 | 9.2 | 8.4 | 18.0 | 11.8 | 12.7 |
1984 | 13.5 | 14.0 | 13.4 | 11.9 | 10.5 | 9.6 | 8.7 | 8.5 | 7.5 | 11.0 | 12.5 | 13.6 |
1985 | 12.5 | 13.5 | 14.4 | 12.9 | 12.5 | 10.0 | 8.8 | 9.0 | 7.5 | 9.0 | 10.9 | 13.0 |
1986 | 13.7 | 14.5 | 14.5 | 11.8 | 11.8 | 9.3 | 9.7 | 8.6 | 8.9 | 9.3 | 12.8 | 13.3 |
1987 | 13.6 | 13.2 | 14.2 | 12.3 | 11.7 | 10.8 | 9.8 | 8.6 | 10.1 | 10.8 | 10.5 | 12.9 |
1988 | 1.0 | 13.8 | 13.2 | 12.9 | 11.9 | 11.9 | 9.1 | 8.7 | 8.6 | 11.7 | 12.4 | 13.0 |
1989 | 13.9 | 14.3 | 13.3 | 13.6 | 10.8 | 10.6 | 9.4 | 8.3 | 8.4 | 8.4 | 13.1 | 14.0 |
1990 | 14.2 | 14.3 | 14.0 | 13.7 | 11.6 | 11.3 | 9.4 | 9.9 | 8.8 | 11.3 | 11.3 | 14.0 |
1991 | 14.2 | 14.0 | 15.5 | 13.2 | - | 9.9 | 9.6 | 8.9 | 9.0 | 10.1 | 12.1 | 11.7 |
1992 | 13.6 | 11.8 | 12.3 | 10.7 | 11.4 | 9.9 | 8.2 | 8.7 | 9.5 | 10.7 | 12.9 | 14.0 |
1993 | 14.2 | 14.2 | 14.4 | 12.3 | 10.6 | 11.0 | 8.5 | 9.7 | 9.0 | 10.2 | 11.1 | 11.1 |
1994 | 15.1 | 14.8 | 14.0 | 13.3 | 11.3 | 10.1 | 11.3 | 10.2 | 9.6 | 11.0 | 11.0 | 12.5 |
1995 | 14.7 | 13.3 | 13.8 | 12.3 | 11.9 | 10.9 | 10.0 | 8.0 | 9.3 | 10.4 | 11.4 | 13.7 |
1996 | 15.1 | 13.8 | 13.4 | 12.4 | 10.6 | 9.9 | 9.1 | 8.2 | 8.1 | 10.0 | 10.7 | 13.0 |
1997 | 14.7 | 15.2 | 15.1 | 13.9 | 12.1 | 9.7 | 10.0 | 9.6 | 9.4 | 9.9 | 10.6 | 12.9 |
1998 | 13.9 | 15.3 | 14.3 | 12.0 | 10.3 | 8.9 | 10.8 | 8.3 | 9.2 | 11.0 | 11.3 | 14.6 |
1999 | 14.3 | 16.0 | 13.9 | 12.5 | 12.3 | 10.0 | 8.1 | 9.1 | 9.3 | 10.1 | 11.3 | 14.3 |
2000 | 14.6 | 15.1 | 13.5 | 13.1 | 12.3 | 9.3 | 9.0 | 10.8 | 9.2 | 10.5 | 12.4 | 15.0 |
2001 | 14.9 | 15.4 | 14.3 | 12.9 | 8.9 | 8.6 | 9.0 | 8.4 | 8.4 | 9.7 | 12.7 | 14.7 |
2002 | 13.2 | 15.1 | 14.5 | 11.0 | 11.2(100) | 10.7( 99) | 8.9 | 9.3( 97) | 9.3(100) | 9.9( 98) | 11.9( 91) | 13.2( 92) |
2003 | 13.7( 94) | 12.9 | 12.9( 94) | 11.8( 95) | 11.3( 82) | 10.6( 98) | 9.7( 98) | 8.5( 84) | 10.0( 78) | 10.4( 88) | 13.4 | 13.5 |
2004 | 14.6 | 15.1 | 14.6 | 12.7 | 11.7 | 10.0 | 10.4 | 10.5 | 10.9 | 11.7 | 12.1 | 12.0( 98) |
2005 | 14.8( 98) | 14.8( 97) | 14.2( 94) | 13.2( 98) | 11.2( 99) | 10.3( 94) | 9.8( 97) | 9.0( 98) | 8.9( 91) | 10.4( 87) | 12.2( 98) | 15.6( 97) |
2006 | 14.6( 98) | 15.3( 99) | 14.2(100) | 14.4( 99) | 11.9( 84) | 11.9 | 10.1( 90) | 9.7( 91) | 10.2( 93) | 10.8( 89) | 13.2( 96) | 13.6( 97) |
2007 | 15.9(100) | 15.2( 96) | 14.1( 96) | 13.0( 96) | 12.2( 83) | 10.4( 85) | 11.2( 94) | 8.0( 98) | 8.0( 99) | 11.9( 94) | 12.4( 98) | 14.0( 98) |
2008 | 16.1( 97) | 15.5(100) | 14.3( 96) | 14.7( 99) | 10.0( 98) | 9.0( 98) | 7.9( 99) | 9.1(101) | 7.9( 97) | 10.4( 98) | 11.9( 99) | 13.9(100) |
2009 | 15.0( 98) | - | - | - | - | - | - | - | - | - | - | - |