Marsh 18Z wind_speed 1987 - - - - - - - - - - - - 1988 - - - - - - - - - 15.4 13.5 - 1989 - - - 15.8 - - 14.2 - 17.3 13.8 7.6 8.6 1990 - - - 13.9 9.2 - - - 12.3 - - - 1991 8.2 - - 13.1 - - - - - - - - 1992 - - - - - - - - - - - - 1993 - - - - - - - - - 21.5 18.4 - 1994 16.1 - - 15.3 - - 20.2 20.5 - 18.2 - - 1995 - - - 17.0 - 15.4 19.2 18.2 - 17.4 17.0 - 1996 18.4 16.1 16.5 - 18.8 17.7 18.9 15.1 17.6 20.9 - - 1997 15.8 12.8 21.1 17.4 18.4 - - - 15.4 18.3 - - 1998 13.8 - 15.9 22.0 15.4 14.1 17.1 18.9 15.8 19.8 16.8 16.0 1999 15.3 17.2 15.8 19.1 17.4 17.9 16.7 22.5 18.5 20.5 21.2 14.6 2000 17.5 16.5 17.9 - - 19.6 14.6 19.1 21.8 18.6 13.3 16.9 2001 14.5 19.9 - 17.3 16.2 19.9 16.9 25.0 23.2 24.7 22.1 - 2002 - 20.4 16.1 - 19.0 20.0 19.4 17.6 15.8 21.6 14.7 19.4 2003 15.0 17.4 18.4 18.7 16.8 23.0 16.8 - - 22.8 15.9 15.6 2004 15.0 14.2 14.4 - 15.7 19.2 21.1 26.0 22.3 - - 18.1 2005 14.3 19.5 17.4 15.0 13.3 16.8 19.0 16.2 13.8 18.6 17.1 15.3 2006 - - 17.5 15.1 21.0 - 19.8 18.0 17.3 - 16.6 17.5 2007 14.6 13.0 13.8 17.9 - - 17.1 19.8 17.8 19.9 14.9 14.1 2008 14.8 15.9 14.5 19.3 16.2 20.8 17.4 18.1 15.8 - 15.2 19.2 2009 13.9 - - - - - - - - - - -