Butler_Island pressure 1986 - - 976.3 977.2 987.1 977.7 969.1 969.5 964.7 969.5 967.4 966.9 1987 976.2 979.0 970.0 978.4 986.3 977.7 - - - - - - 1988 - - - - - 963.3 - 982.4 980.5 987.6 972.6 970.1 1989 977.2 972.7 973.2 - - - - - - - - - 1990 979.8 974.4 975.3 983.3 993.1 970.6 983.4 966.4 972.3 966.1 958.8 975.7 1991 970.9 981.4 977.9 981.0 977.6 976.6 981.1 968.9 978.5 969.5 969.0 - 1992 977.3 977.9 977.4 982.2 988.0 987.9 978.4 974.6 969.9 976.4 968.6 975.3 1993 986.5 978.7 973.2 976.6 - 977.6 977.4 972.9 970.8 964.3 - - 1994 - - - - 983.1 985.1 980.4 968.2 968.3 976.2 980.1 971.8 1995 973.9 974.8 973.2 980.7 976.4 980.3 987.5 978.0 971.3 973.0 969.2 967.5 1996 976.2 971.5 972.0 983.0 973.2 981.4 970.7 976.1 983.5 960.6 963.5 973.6 1997 973.9 979.9 968.7 976.4 976.2 986.7 974.4 971.0 977.6 976.8 983.2 - 1998 971.6 975.1 974.4 968.5 977.0 977.9 969.8 971.4 973.0 969.2 965.6 966.9 1999 - - 979.7 968.8 972.7 985.0 975.7 970.8 974.5 961.4 969.4 962.8 2000 968.0 978.1 986.2 974.2 978.7 978.2 984.0 977.4 981.0 974.0 977.7 978.0 2001 976.9 981.0 - 975.5 982.3 979.4 981.9 959.1 967.5 959.1 962.8 960.6 2002 972.1 965.7 980.8 976.6 984.0 977.8 978.4 972.6 985.5 976.8 976.0 971.6 2003 - - - - - - - - - - - - 2004 - - - - - - - - - - - - 2005 - - - 957.8 - - - 959.9 - - - 966.7 2006 958.9 - - 961.2 - - - - - - - - 2007 - 976.8 977.0 987.7 986.9 983.6 984.3 975.3 979.1 972.7 977.4 967.5 2008 971.7 972.7 980.5 977.3 976.1 979.8 978.9 967.6 976.8 971.0 968.0 961.7 2009 - - - - - - - - - - - -