Whitlock pressure 1982 - 956.8 946.1 948.5 954.6 947.9 957.0 943.0 943.6 948.2 952.6 964.0 1983 963.2 963.7 953.4 948.8 953.1 955.4 948.2 945.5 950.1 936.8 942.6 955.4 1984 965.2 957.9 948.4 948.8 955.6 947.4 943.2 952.1 948.5 940.6 948.0 963.3 1985 961.8 955.3 953.7 953.3 - 950.5 939.7 951.4 941.3 942.5 940.4 950.1 1986 958.3 963.5 959.8 949.7 958.1 958.3 948.7 951.1 945.7 941.7 944.3 952.0 1987 964.5 958.0 955.0 957.3 951.6 954.8 960.1 942.0 956.0 947.2 947.5 956.5 1988 960.0 954.4 953.9 952.8 958.6 962.2 945.4 943.6 952.3 958.2 950.2 952.9 1989 955.5 953.9 952.8 955.7 940.5 949.0 947.5 951.9 951.4 943.8 944.4 959.3 1990 959.3 950.9 954.2 960.8 965.6 956.1 964.8 949.0 940.7 949.7 952.7 954.4 1991 953.0 958.5 950.0 955.5 955.5 958.2 959.3 951.0 948.6 946.0 - 963.6 1992 - - - - - - - - - - - - 1993 - - - - - - - - - - - - 1994 - - - - - - - - - - - - 1995 953.9 954.8 963.7 956.3 953.5 962.0 973.3 959.6 951.0 953.0 952.0 952.3 1996 960.1 963.7 957.4 952.5 959.1 955.2 956.2 - - 945.9 961.0 959.5 1997 962.3 961.8 952.9 959.0 947.2 959.8 - - - - 960.3 964.3 1998 959.4 954.3 955.7 - - - - - - - - - 1999 - - - - - - - - - - - - 2000 - - - - - - - - - - - - 2001 - - 956.7 950.9 956.7 953.4 958.7 953.7 951.1 944.5 948.8 949.7 2002 956.1 950.6 961.9 952.7 963.1 964.8 960.1 949.8 957.8 961.2 955.4 951.4 2003 - - - - - - - - - - - - 2004 - - - - - - - - - - - - 2005 - - - - - - - - - - - - 2006 - - - - - - - - - - - - 2007 - - - - - - - - - - - - 2008 - - - - - - - - - - - - 2009 - - - - - - - - - - - -