Marilyn pressure 1987 - 987.7 985.8 987.8 984.0 - - - - - - 984.3 1988 987.4 983.3 986.1 984.0 990.9 - 976.4 - - - - - 1989 - 985.3 984.8 - - 981.6 981.0 983.5 - - - - 1990 - 981.0 985.0 - - 987.7 - - 970.5 981.2 981.9 983.4 1991 980.3 986.6 979.7 984.1 985.8 988.3 990.0 980.7 979.7 975.9 981.0 993.1 1992 985.9 993.3 986.0 982.5 988.4 992.8 980.6 982.2 972.3 977.2 975.8 980.5 1993 992.7 977.3 984.2 980.3 - - 970.6 975.9 974.9 974.3 977.7 980.7 1994 982.9 981.0 976.9 983.6 983.4 997.5 987.5 973.3 986.6 976.9 982.7 978.8 1995 978.8 979.8 989.4 981.5 980.3 - - - - - 977.3 976.3 1996 984.5 988.3 982.8 976.9 983.5 981.1 980.7 986.9 987.2 970.6 985.1 983.8 1997 986.4 988.0 977.3 982.8 972.2 985.8 977.5 975.8 979.9 976.6 987.7 988.7 1998 983.2 979.8 980.4 973.2 981.0 975.7 978.5 977.5 986.3 978.9 972.5 979.7 1999 981.5 985.7 982.9 979.7 976.8 997.6 978.5 981.6 981.5 963.7 971.1 972.7 2000 976.9 981.1 982.3 982.8 981.8 984.1 980.9 - - - - - 2001 - 985.9 982.4 977.5 983.2 981.8 985.8 980.4 977.2 971.4 974.8 975.3 2002 981.1 975.9 988.7 979.5 991.2 992.2 986.5 976.8 984.5 987.9 981.5 977.1 2003 989.2 988.1 983.8 976.1 978.2 991.2 979.1 975.7 979.9 973.0 981.7 991.9 2004 983.1 992.6 982.3 977.5 980.6 977.6 976.6 980.2 981.0 978.7 975.6 989.0 2005 985.3 977.9 982.0 978.2 980.2 988.6 980.3 976.6 975.7 971.2 978.5 993.9 2006 984.5 983.2 983.7 985.9 975.8 981.1 975.8 990.1 983.3 974.7 977.7 981.6 2007 984.8 981.7 988.1 983.2 985.2 985.9 995.7 979.1 977.9 980.7 980.9 975.0 2008 979.1 978.8 982.8 984.5 982.2 977.8 978.9 980.0 972.0 972.6 976.7 978.4 2009 978.8 984.1 979.8 983.4 987.9 988.8 988.2 985.9 981.0 975.5 981.7 979.9 2010 993.2 988.5 983.0 979.3 980.6 975.2 968.0 971.2 978.7 972.6 972.3 986.7 2011 988.7 983.4 988.3 986.3 976.4 985.2 983.2 984.9 987.3 976.0 984.5 973.6 2012 975.2 982.7 981.0 979.5 978.5 989.1 977.4 981.0 978.2 976.1 986.1 986.2 2013 984.4 976.7 974.0 981.3 982.0 993.2 978.3 987.8 988.3 979.9 978.1 982.2 2014 986.3 981.9 980.5 977.7 981.7 979.6 981.4 973.6 981.9 971.0 982.2 979.7 2015 981.9 975.5 979.4 978.1 982.2 983.1 973.7 975.4 973.2 976.9 974.4 983.0 2016 977.2 979.0 976.5 982.5 980.1 975.2 984.6 986.3 970.2 976.7 988.4 985.7 2017 990.3 985.6 986.8 979.2 974.9 979.5 977.6 974.0 974.6 980.5 972.9 981.0 2018 981.1 980.1 982.7 984.5 982.0 985.8 980.9 987.4 972.6 971.3 973.6 979.7 2019 983.0 985.1 982.8 980.0 984.4 970.8 985.8 981.3 970.8 980.2 989.2 991.2 2020 988.0 979.9 977.8 979.4 976.8 977.0 981.5 983.8 982.4 970.9 974.2 973.7 2021 978.5 975.6 984.6 979.0 981.9 979.7 986.6 - - - - - 2022 - 977.5 978.7 979.5 976.6 988.9 973.9 975.9 972.3 977.6 972.0 973.3 2023 975.0 981.2 982.3 989.3 978.7 987.2 981.0 983.9 978.4 973.9 979.1 975.3 2024 979.2 981.3 979.4 974.2 974.4 974.2 986.6 990.1 982.4 - - -