Whitlock 06Z pressure 1982 - 956.9 946.3 948.6 954.5 948.1 957.1 943.0 944.2 948.1 952.3 963.8 1983 963.2 963.6 953.2 948.8 953.2 955.3 948.4 945.0 950.4 936.8 942.3 955.6 1984 965.1 958.0 948.4 948.8 955.3 947.5 943.2 952.3 948.8 940.8 947.8 963.3 1985 961.9 955.0 953.7 953.3 954.3 950.6 939.4 951.0 941.6 942.9 940.3 949.9 1986 958.3 963.3 960.1 949.5 957.9 958.6 948.8 951.2 945.9 941.6 944.1 951.9 1987 964.2 957.9 955.1 957.3 951.9 954.5 960.0 942.0 955.7 947.2 947.5 956.5 1988 959.9 954.3 953.7 952.7 958.7 962.6 945.1 943.8 952.4 957.9 950.3 952.8 1989 955.4 953.8 952.8 955.7 940.4 949.0 947.6 951.5 951.6 943.7 943.8 959.3 1990 959.4 950.6 954.2 960.4 965.5 956.6 964.9 948.9 940.9 949.5 952.7 954.2 1991 952.9 958.3 949.7 955.8 955.2 958.2 959.6 951.1 948.0 946.0 952.1 963.7 1992 - - - - - - - - - - - - 1993 - - - - - - - - - - - - 1994 - - - - - - - - - - - - 1995 953.6 955.0 963.7 956.5 954.2 962.0 973.3 959.4 951.1 952.8 951.9 952.2 1996 959.9 963.6 957.3 952.3 958.9 955.3 955.7 - - 946.1 961.1 959.5 1997 962.2 962.0 953.2 958.9 947.3 959.9 - - - - 960.1 964.4 1998 959.3 954.2 955.5 - - - - - - - - - 1999 - - - - - - - - - - - - 2000 - - - - - - - - - - - - 2001 - - 956.5 950.9 956.6 953.5 958.4 953.9 950.9 944.5 948.7 949.6 2002 956.0 950.6 961.6 952.9 963.0 964.9 960.0 949.7 957.7 961.2 955.4 951.4 2003 - - - - - - - - - - - - 2004 - - - - - - - - - - - - 2005 - - - - - - - - - - - - 2006 - - - - - - - - - - - - 2007 - - - - - - - - - - - - 2008 - - - - - - - - - - - - 2009 - - - - - - - - - - - -