Clean_Air wind_speed 1986 - 8.7 7.9 8.0 8.8 6.2 8.7 10.3 - - 7.5 6.9 1987 5.8 6.6 8.9 7.6 7.6 8.3 - - - - 6.0 4.4 1988 7.1 6.6 8.8 7.4 6.7 8.9 7.5 7.4 7.9 7.4 5.5 5.5 1989 4.4 6.0 8.2 8.2 8.2 7.9 9.6 10.7 10.2 6.6 7.5 8.8 1990 6.6 6.7 7.3 7.6 7.2 12.1 9.6 8.5 - - - 8.5 1991 6.2 8.0 7.8 7.1 7.6 8.6 10.6 8.4 8.2 8.2 7.5 5.5 1992 4.8 6.8 7.6 7.8 6.3 10.6 5.9 8.7 9.8 6.9 8.3 3.9 1993 6.2 6.4 8.8 6.7 7.8 6.9 5.4 6.2 7.7 - - - 1994 - 6.1 8.8 6.7 8.7 9.4 7.7 8.9 9.9 8.4 6.7 4.9 1995 3.8 7.1 7.9 8.2 9.4 6.7 9.4 7.1 5.7 9.5 8.3 5.0 1996 5.3 7.0 7.0 6.5 7.2 8.4 10.7 9.5 7.6 8.3 8.6 8.4 1997 5.9 6.2 7.2 9.2 9.3 6.9 6.3 9.5 7.4 4.9 9.9 6.0 1998 6.3 6.0 7.0 6.5 8.6 7.0 8.9 7.0 6.5 6.6 9.6 4.9 1999 6.2 5.8 5.8 7.8 8.7 7.0 6.5 8.7 6.3 7.2 5.5 4.9 2000 6.7 5.6 6.2 7.5 7.8 8.3 9.4 7.9 8.4 8.8 10.9 6.4 2001 5.5 5.5 8.9 7.7 8.4 9.0 8.1 9.2 9.2 8.5 8.8 8.4 2002 8.6 8.4 9.4 8.9 8.5 7.7 11.5 10.1 6.0 7.9 6.4 5.0 2003 6.5 6.1 8.0 8.4 9.0 9.2 9.3 11.2 9.8 9.9 6.9 8.8 2004 7.0 8.7 8.8 9.5 10.2 8.7 - 11.7 - - 8.0 8.3 2005 - - - - - - - - - - - - 2006 - - - - - - - - - - - - 2007 - - - - - - - - - - - - 2008 - - - - - - - - - - - - 2009 - - - - - - - - - - - - 2010 - - - - - - - - - - - - 2011 - - - - - - - - - - - - 2012 - - - - - - - - - - - - 2013 - - - - - - - - - - - - 2014 - - - - - - - - - - - - 2015 - - - - - - - - - - - - 2016 - - - - - - - - - - - - 2017 - - - - - - - - - - - - 2018 - - - - - - - - - - - - 2019 - - - - - - - - - - - - 2020 - - - - - - - - - - - - 2021 - - - - - - - - - - - - 2022 - - - - - - - - - - - - 2023 - - - - - - - - - - - - 2024 - - - - - - - - - - - -