D_10 06Z pressure 1980 - - - - - - - 953.4 - - - - 1981 - - - - - - - - - - - - 1982 - - 945.2 946.1 954.0 956.5 963.5 942.8 940.0 - - - 1983 959.6 955.1 949.7 951.7 956.1 957.2 947.8 951.0 949.4 941.2 949.2 - 1984 - 954.7 951.8 952.5 960.8 951.1 953.8 959.7 945.4 945.3 949.5 963.9 1985 - 951.5 954.4 - - 957.6 - 953.2 944.3 946.7 945.0 951.5 1986 955.9 966.1 953.6 - 956.8 950.0 950.4 953.9 - - 949.8 952.2 1987 960.4 951.5 949.2 953.7 947.7 958.7 957.0 939.0 948.4 - - 954.5 1988 955.7 950.0 950.5 951.2 956.5 960.8 945.8 951.0 951.7 956.7 950.2 948.2 1989 955.5 950.7 948.3 953.9 943.3 948.8 952.2 957.4 952.5 949.6 945.7 956.9 1990 955.1 948.0 950.9 - 958.1 956.3 956.3 953.5 941.4 - - - 1991 - - - - - - - - - - - - 1992 - - 952.0 951.1 954.6 960.6 949.1 953.6 943.5 948.8 948.6 952.0 1993 958.8 952.6 - - - - - - 947.1 942.2 945.7 950.8 1994 952.0 951.2 948.7 950.6 953.7 - - - 955.4 948.8 951.9 948.8 1995 951.5 950.5 950.7 948.1 946.0 - - - - - - - 1996 - - - - - - - - - - - - 1997 - - - - - - - - - - - - 1998 - 947.0 946.6 942.7 953.6 948.5 - - 944.9 - - - 1999 952.7 951.7 952.6 942.2 945.6 - - - 950.8 941.9 945.9 944.9 2000 948.4 951.1 951.4 951.2 943.7 954.0 - 960.3 - - - 959.6 2001 954.4 953.2 954.6 950.3 960.3 949.7 - - - 944.7 - - 2002 956.9 - - - 961.8 957.1 - 950.3 948.2 956.4 - 948.7 2003 - - - - - - - - - - - - 2004 - - - - - - - - - - - - 2005 - - - - - - - - - - - - 2006 - - - - - - - - - - - - 2007 - - - - - - - - - - - - 2008 - - - - - - - - - - - - 2009 - - - - - - - - - - - -