Great_Wall 12Z msl_pressure 1987 - - - 988.5 - - - 998.5 - - 983.5 987.8 1988 - - 987.9 - 997.9 - - 1000.5 - - 984.5 984.6 1989 992.2 - 988.6 992.4 986.7 985.5 - 999.4 992.8 984.8 985.4 991.8 1990 990.8 992.3 985.7 991.3 1003.8 985.9 993.3 979.3 993.2 977.5 974.1 - 1991 988.9 - 989.7 993.1 - - - - - - - - 1992 - - - - - - - - - - - - 1993 - - - - - - - - - 985.8 985.6 985.6 1994 985.5 987.0 993.8 996.1 997.1 997.6 996.1 - 982.7 990.9 995.0 - 1995 - - 985.0 - 993.2 990.1 992.0 995.4 989.0 - 983.2 986.5 1996 991.8 - 986.8 995.6 988.0 992.8 - 990.5 - 985.4 - - 1997 988.1 - 989.5 986.3 998.8 1002.4 - - 993.8 990.9 - - 1998 985.1 995.8 990.2 995.9 999.9 996.2 979.0 985.6 990.5 981.6 984.8 983.0 1999 990.0 985.5 995.8 988.3 993.7 998.0 990.5 989.9 991.8 986.9 988.4 983.7 2000 981.6 996.7 1003.4 989.4 998.4 997.6 1004.9 992.4 1002.6 990.0 994.9 990.0 2001 989.5 988.7 - - 999.3 992.8 - 982.0 991.6 984.8 - - 2002 - 987.6 991.3 - 993.7 991.5 994.5 999.8 1003.0 990.3 990.4 991.7 2003 994.5 987.3 997.7 994.0 991.6 - 984.6 - - 985.6 984.7 995.5 2004 986.8 999.1 991.0 993.7 993.3 988.8 991.2 992.6 980.0 - - 990.9 2005 987.1 987.0 991.4 984.4 995.2 997.0 998.2 993.3 999.4 994.3 991.4 995.3 2006 - - 974.5 992.2 - - - 1000.6 992.8 - 984.2 986.7 2007 - 987.8 990.0 - - - - 987.7 999.2 985.9 991.5 985.1 2008 - 990.5 991.7 988.2 994.7 994.7 996.7 992.9 - - 984.5 982.6 2009 986.3 - - - - - - - - - - -