YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC D-J-F M-A-M J-J-A S-O-N metANN 1969 999.9 999.9 999.9 999.9 999.9 999.9 12.4 12.9 12.6 16.1 17.7 18.6 999.9 999.9 12.8 15.5 999.90 1970 19.7 21.3 19.9 16.8 14.4 13.3 12.6 12.3 13.8 15.2 17.1 19.7 19.9 17.0 12.7 15.4 16.25 1971 20.8 20.8 20.3 18.2 14.5 13.5 12.5 12.0 13.4 14.7 15.7 17.1 20.4 17.7 12.7 14.6 16.34 1972 19.5 21.3 19.3 18.3 16.5 13.9 12.3 12.8 14.4 15.6 17.6 21.9 19.3 18.0 13.0 15.9 16.55 1973 21.5 21.2 20.0 18.4 16.0 12.1 13.3 12.3 13.5 15.6 17.3 18.8 21.5 18.1 12.6 15.5 16.93 1974 21.3 20.1 19.3 16.7 15.1 13.3 12.8 13.1 14.3 15.7 17.6 19.9 20.1 17.0 13.1 15.9 16.51 1975 19.5 22.6 18.2 18.6 15.8 12.9 13.2 13.0 14.2 15.5 18.1 19.4 20.7 17.5 13.0 15.9 16.79 1976 20.3 20.9 20.2 18.5 16.0 12.9 13.2 13.6 14.5 15.6 17.1 19.8 20.2 18.2 13.2 15.7 16.85 1977 21.3 21.6 19.9 16.8 14.7 13.6 13.0 14.0 13.5 16.2 18.3 21.4 20.9 17.1 13.5 16.0 16.89 1978 21.6 21.9 20.9 19.3 15.8 13.1 12.8 13.4 14.3 15.2 17.8 19.8 21.6 18.7 13.1 15.8 17.29 1979 21.9 21.3 21.1 17.5 14.0 13.7 13.0 12.6 13.9 15.8 17.8 20.4 21.0 17.5 13.1 15.8 16.87 1980 21.3 20.2 21.1 18.3 16.0 13.2 12.7 13.8 15.3 14.4 19.6 19.9 20.6 18.5 13.2 16.4 17.19 1981 20.4 19.9 19.2 19.7 15.8 12.3 12.2 12.7 15.7 17.0 17.2 18.5 20.1 18.2 12.4 16.6 16.83 1982 21.2 21.8 19.2 17.3 15.6 12.4 11.8 14.8 14.9 16.5 20.9 21.1 20.5 17.4 13.0 17.4 17.08 1983 21.7 22.1 19.5 17.9 16.9 15.1 13.1 14.9 15.8 17.2 17.2 20.1 21.6 18.1 14.4 16.7 17.71 1984 21.1 20.7 19.3 18.8 15.7 13.5 12.3 12.6 13.3 16.9 18.2 19.0 20.6 17.9 12.8 16.1 16.88 1985 21.6 23.5 21.0 17.9 15.2 15.1 13.1 13.3 14.6 15.6 18.5 18.7 21.4 18.0 13.8 16.2 17.37 1986 21.9 20.0 20.5 17.1 15.3 13.1 11.7 12.6 14.5 14.7 18.1 17.7 20.2 17.6 12.5 15.8 16.52 1987 20.1 20.4 20.5 19.4 14.4 13.9 12.5 12.6 15.3 15.9 16.8 19.8 19.4 18.1 13.0 16.0 16.62 1988 20.3 20.1 20.9 18.0 16.1 14.9 12.3 13.5 15.3 17.1 16.9 19.0 20.1 18.3 13.6 16.4 17.10 1989 20.5 22.1 19.8 18.1 15.6 13.1 12.2 12.8 15.3 15.8 18.7 20.1 20.5 17.8 12.7 16.6 16.92 1990 21.1 20.1 21.1 18.1 15.9 12.7 11.7 12.3 15.1 15.7 18.3 18.9 20.4 18.4 12.2 16.4 16.85 1991 21.1 21.6 19.9 19.4 16.7 14.6 13.3 13.3 14.5 17.1 17.4 20.1 20.5 18.7 13.7 16.3 17.32 1992 20.1 21.3 21.2 18.1 15.4 13.5 13.5 12.2 12.5 15.3 15.9 18.2 20.5 18.2 13.1 14.6 16.59 1993 21.0 20.6 19.3 18.6 15.0 12.5 12.3 13.3 14.0 14.7 18.0 19.5 19.9 17.6 12.7 15.6 16.46 1994 19.9 20.3 20.9 19.1 16.7 999.9 14.0 13.8 15.0 15.6 16.7 19.1 19.9 18.9 14.1 15.8 17.16 1995 20.3 19.9 18.7 15.9 14.4 13.0 12.3 14.3 13.8 15.5 16.6 17.7 19.8 16.3 13.2 15.3 16.15 1996 18.8 20.7 18.7 16.8 15.9 13.3 12.8 12.3 14.0 15.3 17.4 17.9 19.1 17.1 12.8 15.6 16.14 1997 21.0 21.2 18.5 18.0 14.5 13.0 11.2 12.0 13.6 14.9 16.8 19.1 20.0 17.0 12.1 15.1 16.05 1998 20.2 19.5 20.8 17.7 16.8 12.9 11.3 14.6 14.5 15.5 18.5 19.5 19.6 18.4 12.9 16.2 16.78 1999 21.4 20.7 19.6 999.9 16.9 999.9 13.5 999.9 999.9 999.9 999.9 19.1 20.5 18.3 999.9 999.9 999.90 2000 20.5 20.7 19.2 17.7 14.9 14.1 12.8 999.9 15.1 16.3 18.4 20.3 20.1 17.3 13.5 16.6 16.86 2001 21.8 20.7 19.9 18.8 16.0 14.1 13.2 999.9 999.9 14.5 16.8 17.2 20.9 18.2 13.7 14.9 16.93 2002 20.5 19.3 21.0 18.2 17.4 14.3 13.3 13.4 14.1 16.4 18.0 18.6 19.0 18.9 13.7 16.2 16.93 2003 20.5 22.6 20.9 19.2 16.5 13.2 12.5 12.6 13.8 14.8 17.8 19.8 20.6 18.9 12.8 15.5 16.92 2004 19.8 21.8 19.0 18.2 15.2 14.6 12.1 12.6 13.7 17.0 17.9 20.9 20.5 17.5 13.1 16.2 16.81 2005 20.2 20.9 21.6 18.3 17.0 13.3 12.7 999.9 13.9 14.9 17.2 17.3 20.7 19.0 13.0 15.3 17.00 2006 18.6 19.2 19.0 15.8 14.7 12.0 11.8 14.7 14.4 16.1 18.3 19.6 18.4 16.5 12.8 16.3 15.99 2007 20.0 21.1 19.4 17.4 14.3 12.4 13.3 13.3 13.8 14.5 17.6 17.9 20.2 17.0 13.0 15.3 16.39 2008 20.6 21.1 20.0 18.3 16.9 14.0 12.3 12.1 15.1 16.4 16.3 18.7 19.9 18.4 12.8 15.9 16.75 2009 21.3 21.0 19.5 17.2 15.4 13.6 12.6 13.4 999.9 16.5 999.9 999.9 20.3 17.4 13.2 999.9 16.67