Clean_Air 18Z wind_direction 1986 - 35.9 55.7 44.5 80.0 85.4 62.0 47.9 - - 40.9 46.4 1987 48.1 49.6 50.5 74.0 69.5 69.7 - - - - 70.0 76.9 1988 19.8 70.5 54.8 72.7 84.9 74.7 68.1 36.1 53.2 74.5 69.6 65.5 1989 43.9 67.6 74.1 98.0 76.2 79.3 61.9 35.7 55.6 72.8 50.9 40.2 1990 40.8 66.3 75.3 77.1 86.9 50.7 67.2 65.9 - - - 28.9 1991 38.8 55.4 70.3 88.4 79.9 82.0 74.9 72.7 45.8 65.9 45.3 54.1 1992 47.3 74.5 99.2 53.5 73.8 54.9 91.9 74.5 41.7 54.0 58.7 60.3 1993 43.5 59.1 60.0 71.0 61.2 77.5 44.1 73.4 56.8 - - - 1994 - 62.2 38.2 65.7 41.7 53.5 71.7 45.1 53.3 43.7 21.9 68.5 1995 74.4 34.0 58.6 59.5 72.6 63.4 59.7 76.2 83.6 34.5 29.9 22.8 1996 50.4 31.7 73.7 53.9 65.0 44.1 52.0 46.4 63.0 44.1 45.4 27.3 1997 66.4 66.8 72.0 35.8 46.6 67.8 69.4 35.4 58.3 73.4 36.9 73.0 1998 8.1 55.7 52.7 57.6 71.1 58.2 51.0 68.5 61.3 67.6 18.0 24.1 1999 25.3 47.3 57.4 56.6 38.7 75.4 81.1 54.8 75.1 39.4 39.7 39.0 2000 26.4 19.5 60.4 52.0 50.3 48.9 33.0 38.1 39.8 358.7 2.2 12.2 2001 23.6 28.2 36.8 45.7 42.2 34.9 48.1 45.2 28.2 30.2 16.9 14.8 2002 18.3 33.0 38.2 24.3 48.1 57.6 12.0 22.7 61.7 52.8 28.9 24.5 2003 - - - - - - - - - - - - 2004 - - - - - - - - - - - - 2005 - 192.2 197.3 149.9 162.6 138.9 47.6 153.9 59.8 152.7 151.5 343.8 2006 356.4 - - - - - - - - - - - 2007 - - - - - - - - - - - - 2008 - - - - - - - - - - - - 2009 - - - - - - - - - - - -