Year,Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec,Average
1975,15.2,14.7,13.7,14.6,14.8,14.2,13.7,13.0,12.2,12.2,12.3,11.7,13.5
1976,11.4,10.9,11.5,11.3,11.6,11.1,10.9,11.2,11.4,11.1,10.4,10.8,11.1
1977,10.7,11.9,11.8,11.5,11.1,11.0,11.3,11.3,11.3,11.2,11.4,11.1,11.3
1978,11.3,10.6,9.9,9.7,9.5,9.2,12.5,11.7,11.7,11.7,11.5,11.6,10.9
1979,11.6,11.3,12.6,12.8,12.8,13.5,12.9,13.9,14.3,14.2,14.2,14.0,13.2
1980,13.8,14.3,13.1,13.4,14.1,14.6,12.2,11.9,12.8,14.4,14.9,15.8,13.8
1981,15.5,16.0,16.2,15.5,15.0,14.5,15.5,16.1,15.6,14.5,14.4,13.9,15.2
1982,13.9,13.6,15.4,16.5,16.5,16.1,14.4,13.8,14.1,14.3,14.2,13.8,14.7
1983,14.4,14.9,13.6,12.6,12.8,12.4,12.1,12.2,10.9,10.7,10.6,11.0,12.4
1984,10.3,10.0,10.2,11.0,11.0,11.7,12.4,11.8,12.2,12.5,13.3,13.3,11.6
1985,13.3,16.0,15.1,15.8,16.1,16.4,15.9,16.4,16.6,16.8,16.9,18.4,16.1
1986,20.7,18.1,18.9,18.6,17.5,16.9,18.2,18.7,19.7,19.2,19.2,18.1,18.7
1987,16.1,16.3,16.8,16.2,17.3,17.2,16.3,16.3,15.8,15.8,15.0,14.7,16.1
1988,14.2,13.7,13.4,13.3,12.9,12.4,12.4,12.3,12.4,12.3,12.4,12.5,12.9
1989,13.3,13.5,13.8,14.0,14.9,15.7,13.5,15.5,14.9,14.8,14.9,15.3,14.7
1990,15.1,14.9,14.9,14.6,13.9,13.6,13.3,13.6,14.3,14.0,15.3,14.6,14.4
1991,14.3,15.0,15.7,15.6,15.2,15.2,15.8,15.6,15.4,16.8,15.5,16.2,15.3
1992,15.8,15.8,15.7,15.6,14.8,15.1,14.6,14.3,13.5,11.7,11.0,9.6,13.9
1993,9.7,9.0,9.7,11.0,10.6,10.0,9.9,9.3,9.1,9.4,9.2,9.5,9.7
1994,9.9,9.9,9.0,7.1,7.2,7.5,8.2,9.4,10.1,9.8,9.9,9.9,9.0
1995,9.6,9.9,10.2,11.0,10.8,10.0,9.0,7.5,6.4,6.3,6.4,6.9,8.7
1996,6.9,6.5,6.3,5.5,5.9,6.9,7.1,7.5,8.4,9.1,9.2,9.4,7.4
1997,9.4,9.8,9.6,9.9,9.5,8.8,9.1,8.7,8.0,7.5,6.8,6.1,8.6
1998,5.6,5.4,5.4,5.0,5.1,5.2,6.6,7.6,9.1,9.0,9.4,9.0,6.9
1999,8.9,8.6,7.9,7.7,7.1,7.3,4.9,3.2,1.9,1.7,1.9,2.2,5.1
2000,2.6,2.4,3.4,4.6,5.1,5.1,5.9,6.8,6.8,7.1,7.1,7.0,5.3
2001,7.1,7.8,7.4,6.5,6.4,6.3,5.3,4.6,4.4,4.0,4.3,4.6,5.7
2002,5.0,5.9,6.2,7.4,7.8,8.0,9.6,10.4,11.2,13.0,12.9,12.4,9.2
2003,11.6,10.3,10.2,8.8,7.8,6.7,5.2,5.1,3.7,1.5,0.4,0.3,5.8
2004,0.2,0.7,0.4,0.2,0.6,1.2,1.6,1.0,1.3,2.4,3.7,3.4,1.4
2005,3.0,2.6,3.0,3.4,3.3,2.8,3.4,3.9,4.4,4.0,3.4,3.6,3.4
2006,4.0,3.9,3.4,3.3,3.9,4.9,5.0,5.4,5.3,5.4,5.4,5.8,4.7
2007,6.0,5.7,6.1,7.0,6.9,7.0,7.0,6.7,7.2,7.9,8.4,9.0,7.1
2008,9.3,9.8,10.6,11.1,11.7,12.2,13.4,13.7,13.1,12.1,11.8,9.5,11.5
2009,8.1,8.6,8.5,8.4,8.0,6.9,6.7,6.4,6.1,5.9,5.8,6.3,7.1
2010,6.2,5.7,5.1,4.8,4.6,4.1,3.7,3.5,3.2,3.4,3.6,3.5,4.3
2011,3.7,3.7,4.1,4.2,4.6,5.0,5.3,5.3,5.7,6.0,6.1,6.1,5.0
2012,6.3,6.1,6.0,6.1,5.7,5.5,4.9,5.0,5.5,5.6,5.6,5.7,5.6
2013,5.4,5.9,5.9,5.9,5.6,5.5,6.3,6.4,6.0,5.5,5.3,5.4,5.7
2014,5.8,5.9,6.0,6.1,6.6,6.6,6.3,6.4,5.9,5.9,5.8,5.3,6.1
2015,4.4,3.9,4.0,4.5,4.6,4.7,5.0,4.6,4.6,4.7,4.8,5.2,4.6
2016,6.2,7.0,6.3,6.2,6.1,6.3,6.0,5.9,6.1,6.4,6.6,6.8,6.4
2017,6.6,6.3,6.1,5.3,5.4,5.1,4.6,4.8,5.1,4.8,4.6,4.7,5.3
2018,4.4,4.0,3.8,4.5,4.4,4.6,5.1,4.9,4.9,5.1,5.2,4.5,4.7
2019,4.0,4.1,4.5,4.4,4.5,4.5,4.0,4.3,4.1,3.7,3.6,4.0,4.1
2020,4.5,4.6,4.1,3.0,2.1,2.2,3.2,3.1,3.0,3.3,3.2,3.1,3.3
2021,3.2,2.9,3.2,4.4,5.2,4.9,4.6,4.9,5.0,5.0,5.5,5.9,4.5
2022,5.7,5.7,5.9,5.9,6.5,7.4,7.8,7.6,7.5,7.6,7.4,7.2,6.9
2023,6.9,7,7.1,6.8,6.3,5.4,4.7,4.8,5.4,5.9,5.5,5.1,6
2024,5.3,5.6,5.3,5.2,5.2,5.1,4.6,4.4,3.8,2.8,2.9,3,4.4
2025,3.2,3.2,2.7,,,,,,,,,,