2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 J -15.3 -9.3 -14.2 -4.8 -19 -7.8 -16.7 5.5 -8.4 -2 -16 -7 -10.9 -0.4 -7.7 F -19.4 -9.7 -11.1 -13 -1.6 -11.2 -3.9 13.1 -11.4 1.8 -15.6 -6.5 -15.5 -10.8 M -14.9 -0.1 -12 -3 -1.2 3.5 -8.6 -10.7 -12.6 -4.9 -1.1 -5.3 A -5.7 -4.6 -0.7 1.1 0.5 13.5 -7.1 3.4 -5.9 -8.9 -6.5 0 M 10.1 2.8 16.8 -4.3 2.7 15.4 18.6 31.8 -2.9 5.8 16 21.6 J 7.5 19.7 22.8 42.8 28.8 24.1 13.4 39.4 15.3 33.3 J 24 23.1 42.8 29.3 46.5 27.8 39.4 27.6 28.4 30.5 29.5 29 40.9 A 21.2 28.5 41.7 49.2 35.3 21.6 27.3 16.1 27.8 18.2 36.4 17.1 S 27.6 30.3 20.3 41.2 41.6 26.9 27 23.5 8.7 16.2 25.9 20.7 O 9.1 -6.9 19.4 16.2 28.6 8.2 15 2.5 10.6 -6 22.6 5.2 N -6.6 5 5.9 0.9 22 -3.4 6.5 12.8 -4.1 -4.4 0.5 D -16.3 -13.8 -5.5 -2.2 -9.4 -4.8 -4 12.3 -4 -7.4 -6 -5.5 -12.2 -8.5 -8.7