Clean_Air 12Z wind_direction 1986 - 41.1 50.3 38.5 79.2 81.5 67.5 45.1 - 60.2 36.0 47.2 1987 47.2 48.8 49.3 68.8 67.4 59.1 - - - 70.5 77.9 58.6 1988 22.8 70.1 47.4 71.8 83.6 72.4 70.3 47.0 45.1 76.1 50.5 60.4 1989 49.0 59.9 69.4 92.9 71.8 77.2 54.9 38.9 59.9 75.3 48.5 39.1 1990 40.2 65.0 81.8 83.5 91.1 48.2 63.1 63.0 - - - 26.7 1991 37.9 56.1 68.6 89.6 77.2 77.9 70.7 77.0 42.7 68.0 42.3 60.9 1992 55.9 68.7 98.1 55.7 78.1 60.6 92.0 71.1 39.5 61.1 54.1 55.3 1993 50.6 54.0 61.8 75.3 67.4 77.6 43.1 68.3 57.6 - - - 1994 - 63.0 34.5 66.8 39.6 60.7 80.5 42.4 58.4 44.3 26.9 66.3 1995 62.9 45.7 59.9 53.4 70.4 60.8 58.9 67.8 84.0 33.6 30.2 29.2 1996 46.8 33.2 73.3 53.4 62.7 48.0 50.6 53.7 60.7 47.4 49.3 33.2 1997 53.2 76.3 73.5 37.1 44.1 65.5 69.3 38.8 58.3 66.9 34.8 73.0 1998 3.9 50.3 48.2 57.1 70.3 53.2 52.7 63.7 57.5 57.0 24.0 21.2 1999 27.7 44.3 55.8 57.2 40.1 69.9 79.9 65.0 81.3 45.2 35.4 32.2 2000 26.1 22.2 56.6 51.9 56.1 46.1 32.6 40.7 47.0 6.5 357.1 14.7 2001 32.4 37.6 35.7 46.0 33.4 31.8 47.4 48.4 25.9 28.7 18.1 7.4 2002 17.4 31.5 32.1 23.0 47.8 54.7 13.5 26.4 59.0 45.4 20.7 33.4 2003 - - - - - - - - - - - - 2004 - - - - - - - - - - - - 2005 - 195.7 194.4 158.8 155.6 152.4 102.7 69.4 116.8 169.9 164.4 24.8 2006 87.0 - - - - - - - - - - - 2007 - - - - - - - - - - - - 2008 - - - - - - - - - - - - 2009 - - - - - - - - - - - -