Clean_Air 18Z wind_speed 1986 - 7.8 7.7 7.9 8.8 6.0 10.0 9.9 - - 7.5 6.8 1987 5.7 6.1 8.9 7.6 7.2 8.4 - - - - 6.2 4.1 1988 6.9 6.2 8.5 7.3 6.5 8.7 7.9 7.3 8.0 7.3 5.5 5.3 1989 3.9 6.2 8.2 8.1 8.2 7.0 9.4 11.0 10.6 6.6 7.1 8.5 1990 6.9 6.4 7.4 7.7 7.1 11.9 9.5 7.9 - - - 8.5 1991 6.4 8.8 7.4 7.0 7.7 8.8 10.7 8.2 8.3 7.9 7.3 5.4 1992 5.0 6.9 7.5 8.4 5.9 9.8 6.3 8.3 9.3 6.6 8.2 3.8 1993 6.2 6.0 9.4 6.9 7.8 6.4 5.4 5.7 8.3 - - - 1994 - 6.2 8.7 7.4 8.8 9.6 8.2 8.7 9.9 8.8 6.5 5.3 1995 3.6 7.6 8.0 7.9 9.4 6.4 9.4 6.6 6.2 9.1 8.3 4.6 1996 5.4 7.5 6.5 5.7 7.6 8.4 10.9 9.9 7.6 7.7 8.5 8.3 1997 6.0 6.1 7.0 9.6 9.4 7.1 6.1 9.8 7.1 4.4 9.9 5.9 1998 7.0 5.7 6.6 6.6 9.1 7.2 9.1 7.4 7.1 6.6 10.2 4.9 1999 6.2 5.7 6.1 7.9 8.9 6.9 6.6 8.4 6.3 7.2 5.6 4.8 2000 6.9 5.5 6.2 7.7 7.9 8.2 8.9 7.7 8.8 8.8 10.8 6.3 2001 5.6 5.5 8.3 7.1 8.3 9.1 8.4 9.5 9.0 8.4 9.4 7.9 2002 8.3 8.6 9.5 8.3 8.6 7.6 11.6 9.6 6.3 7.2 6.6 5.1 2003 6.7 6.1 8.7 8.3 9.2 9.4 9.0 11.1 10.2 9.5 7.2 9.4 2004 7.2 8.5 8.7 9.9 10.1 8.9 - 11.7 - - 7.9 8.4 2005 - - - - - - - - - - - - 2006 - - - - - - - - - - - - 2007 - - - - - - - - - - - - 2008 - - - - - - - - - - - - 2009 - - - - - - - - - - - - 2010 - - - - - - - - - - - - 2011 - - - - - - - - - - - - 2012 - - - - - - - - - - - - 2013 - - - - - - - - - - - - 2014 - - - - - - - - - - - - 2015 - - - - - - - - - - - - 2016 - - - - - - - - - - - - 2017 - - - - - - - - - - - - 2018 - - - - - - - - - - - - 2019 - - - - - - - - - - - - 2020 - - - - - - - - - - - - 2021 - - - - - - - - - - - - 2022 - - - - - - - - - - - - 2023 - - - - - - - - - - - - 2024 - - - - - - - - - - - -