YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 1951 12.5 11.0 10.0 10.8 11.9 12.2 12.2 14.0 12.9 12.3 11.1 11.0 1952 9.4 10.2 12.5 11.8 12.9 14.6 14.7 13.9 14.1 13.3 10.7 9.6 1953 11.8 10.6 10.9 11.2 11.2 13.4 14.7 12.0 13.3 13.6 11.9 10.7 1954 10.5 11.0 11.4 10.8 12.2 13.2 13.9 15.0 14.6 13.9 12.4 12.5 1955 11.7 11.4 11.1 10.6 12.5 14.0 15.4 15.3 15.7 14.8 12.9 12.9 1956 11.6 11.9 12.6 11.9 12.9 14.0 14.0 14.9 13.9 15.7 12.0 11.0 1957 12.0 10.5 11.4 11.9 12.3 13.5 14.1 13.6 13.8 14.3 11.0 10.6 1958 9.4 10.4 11.8 11.5 11.2 12.8 13.9 14.5 13.3 12.4 11.3 10.6 1959 8.8 10.4 12.5 11.6 12.5 13.3 13.8 14.1 14.3 14.1 12.4 11.2 1960 11.1 11.1 12.2 11.9 12.2 13.4 14.2 15.2 14.1 13.6 12.7 12.1 1961 11.1 12.3 9.5 12.6 12.9 13.7 14.3 14.7 14.6 12.5 13.2 12.9 1962 13.1 11.1 11.9 12.1 13.3 13.5 13.2 15.7 14.3 14.2 11.7 11.1 1963 12.2 13.3 12.0 11.9 12.2 13.1 14.1 13.6 14.0 12.9 11.8 10.2 1964 11.0 11.4 12.3 13.1 12.1 13.9 13.8 16.1 15.1 14.6 11.1 10.5 1965 9.9 10.7 11.5 12.2 12.7 13.7 13.0 13.7 13.3 13.5 10.7 10.4 1966 9.4 10.5 10.1 11.5 12.8 14.6 13.8 15.0 14.1 13.8 11.9 10.4 1967 12.5 12.9 12.7 12.6 12.2 14.4 13.9 15.4 16.0 13.6 11.1 10.2 1968 9.4 11.7 11.6 11.7 13.0 14.9 14.7 14.4 14.1 13.6 12.2 11.1 1969 7.4 9.5 12.3 12.2 11.8 13.8 13.4 14.4 12.4 12.5 12.0 11.1 1970 10.5 9.5 11.5 11.8 12.5 14.3 13.9 14.3 14.6 13.3 13.4 12.2 1971 10.8 12.4 13.5 13.1 13.2 14.5 13.7 15.7 15.8 15.3 12.3 9.7 1972 11.0 11.3 11.1 12.3 12.0 12.5 11.9 14.1 13.6 13.7 12.2 10.7 1973 11.1 10.0 11.5 11.1 12.8 13.7 14.3 15.1 16.0 14.1 13.5 13.4 1974 12.8 12.4 13.2 12.5 14.0 13.9 15.5 14.8 15.4 14.0 10.5 9.9 1975 9.8 12.6 12.7 11.9 12.8 14.5 16.0 16.2 16.6 14.7 13.2 12.8 1976 12.0 12.7 12.0 12.4 13.9 13.8 13.2 13.9 13.2 13.4 12.1 9.3 1977 9.5 12.1 10.3 10.5 11.6 12.5 12.3 13.4 13.8 13.1 10.7 9.6 1978 12.0 8.2 12.4 11.5 13.0 13.0 13.1 13.9 14.1 12.7 12.1 10.7 1979 9.6 12.9 11.3 11.4 13.3 14.5 14.3 14.2 14.3 13.5 11.3 10.6 1980 11.0 11.1 9.6 10.5 12.5 13.2 13.9 15.3 14.2 13.4 11.5 10.6 1981 10.1 10.1 10.8 11.6 13.2 14.5 14.1 14.9 14.5 13.1 11.7 11.9 1982 12.9 11.7 11.8 12.2 12.5 12.7 12.5 12.7 13.2 12.1 9.3 8.6 1983 7.7 7.8 8.9 10.4 14.0 14.1 14.1 15.6 16.1 14.0 12.5 12.0 1984 11.8 11.1 10.9 12.7 12.7 13.3 14.3 14.2 14.4 13.4 12.8 8.3 1985 11.3 11.9 10.7 11.6 11.4 12.6 14.2 15.4 13.9 12.7 11.1 11.5 1986 10.8 9.2 12.5 11.8 12.4 13.5 14.1 12.5 13.7 14.8 10.1 10.5 1987 10.2 9.3 11.6 10.9 11.5 11.8 13.0 13.8 14.0 13.2 11.9 10.4 1988 12.0 10.2 11.2 12.3 13.7 14.8 15.5 16.5 16.3 14.4 13.5 12.2 1989 12.6 13.3 12.5 12.5 13.6 14.9 14.5 14.0 15.0 14.0 11.3 11.4 1990 11.1 10.9 10.7 12.0 13.7 13.7 14.6 14.4 14.4 14.1 11.2 10.7 1991 11.8 11.2 11.5 10.7 11.9 13.8 14.2 14.5 12.9 11.9 11.9 8.7 1992 9.2 10.3 10.0 11.1 12.8 12.1 14.6 14.7 13.7 11.3 11.3 9.7 1993 9.5 9.3 12.5 11.2 13.0 13.1 12.8 14.6 14.5 12.7 11.9 10.8 1994 10.8 11.2 11.4 10.4 12.0 12.8 12.4 13.9 13.0 12.5 11.8 10.5 1995 10.6 11.8 11.8 10.3 12.1 14.0 14.3 15.0 14.9 12.9 11.9 10.0 1996 11.9 10.9 12.7 12.4 14.0 15.3 14.5 15.0 13.8 13.5 11.3 10.7 1997 12.6 12.2 11.0 12.8 10.7 12.9 13.7 13.7 14.5 13.4 12.2 10.3 1998 7.2 10.7 8.7 10.4 13.2 14.6 15.6 16.1 15.9 14.3 12.2 11.9 1999 12.6 12.2 11.9 13.2 13.8 14.3 15.0 15.9 14.7 14.8 12.9 12.7 2000 12.3 13.9 13.1 12.8 13.6 13.9 13.5 14.7 16.0 13.8 12.9 9.8 2001 13.4 10.8 12.8 11.7 12.5 13.5 13.8 13.7 14.5 12.5 12.7 9.6 2002 12.4 12.8 11.9 11.8 11.8 13.4 14.5 13.1 14.3 12.5 12.0 10.5 2003 10.9 9.6 11.2 12.2 12.2 12.6 14.8 14.4 14.3 13.0 11.8 11.7 2004 9.5 12.7 10.8 10.9 13.7 13.7 13.8 14.2 14.9 13.7 11.0 9.3 2005 11.3 7.4 12.3 11.9 12.1 13.6 14.3 14.1 15.0 14.8 11.0 11.1 2006 12.1 11.9 12.7 11.6 12.4 13.8 14.1 13.9 14.6 13.3 13.0 11.6 2007 9.6 11.2 11.3 12.3 12.8 13.2 14.4 15.4 14.2 14.0 12.2 12.5 2008 12.5 13.8 14.3 13.1 13.3 14.9 14.7 16.6 16.4 16.1 13.6 12.6 2009 12.4 12.9 12.5 12.7 11.6 13.6 14.3 13.8 14.3 11.9 10.8 10.0 2010 8.2 9.3 10.9 13.8 13.1 14.6 16.5 16.8 17.3 15.2 13.9 13.7 2011 13.7 14.3 14.2 14.3 13.9 14.7 15.8 15.6 16.9 14.4 13.6 13.0 2012 12.4 12.3 10.8 12.2 12.6 13.2 13.5 14.9 15.0 14.1 12.8 10.0 2013 10.0 11.0 13.2 12.1 13.5 14.1 14.7 14.7 14.6 13.3 12.0 11.3 2014 12.0 10.3 10.6 12.3 13.9 13.5 14.4 14.4 14.2 13.2 11.3 9.9 2015 9.3 12.5 10.8 12.4 13.0 13.0 13.7 13.4 13.3 13.4 11.6 9.4 2016 10.6 9.2 12.3 10.5 12.9 14.1 14.7 14.9 15.6 12.6 11.6 10.7 2017 10.7 11.2 12.3 11.3 13.4 13.4 15.4 15.2 15.8 13.8 12.1 10.5 2018 11.1 10.3 12.0 12.4 14.1 14.2 14.0 13.7 13.0 14.4 12.3 11.5 2019 11.1 10.7 11.1 12.3 12.8 13.7 14.3 15.3 14.8 13.4 11.2 10.8 2020 11.9 11.5 12.1 12.8 14.4 12.9 14.3 15.7 15.7 13.6 13.3 13.3 2021 13.5 12.0 12.0 12.3 13.4 14.6 15.7 15.7 15.9 13.7 13.1 12.7 2022 11.8 13.2 14.0 13.6 14.3 15.5 15.4 15.3 16.7 15.1 12.2 13.0 2023 12.9 12.1 12.0 11.5 12.4 14.0 14.4 14.8 13.7 14.7 11.8 11.0 2024 11.4 9.9 12.2 11.6 13.7 14.5 13.6 16.3 14.1 14.2 13.2 11.9 2025 11.7 12.0 13.9 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9 -99.9