Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
1957	13.8	14.6	12.8	9.7	5.7	2.6	1.6	2.8	4.6	7.4	9.3	12.4	8.1
1958	13.9	14.9	13.2	9.7	5.7	2.9	1.7	2.9	4.5	7.6	9.3	12.3	8.2
1959	13.9	15.0	13.6	9.6	6.0	3.1	1.6	2.8	4.5	7.4	8.6	11.9	8.2
1960	13.6	15.0	13.5	9.6	5.9	3.0	1.7	2.5	4.3	7.2	8.7	12.1	8.1
1961	13.8	13.7	12.3	8.5	5.4	2.7	1.6	2.7	5.1	7.4	9.2	12.1	7.9
1962	13.2	12.9	11	7	4.7	3.4	1.5	3.5	5.2	6.1	9.8	12.2	7.5
1963	13.3	13	12.9	6.5	8.4	3.1	2.3	2.3	5.4	8.1	8.9	12.9	8.1
1964	13.1	11.4	11	8.6	2.8	3.7	1.9	3.1	5.3	6.4	10.1	9.8	7.3
1965	11.6	13.2	10	7.2	4.3	-0.4	0.6	2.1	7	8.7	9	13.2	7.2
1966	13.2	12.8	11.2	7.7	2.5	2.1	0.7	1.7	4.6	7.3	9.6	11.9	7.1
1967	13.8	11.1	10.1	8.4	5.1	2.1	1.4	2.3	5.6	7.6	9.4	12.0	7.4
1968	12.9	12.1	10.6	8.0	3.7	1.9	1.1	2.3	5.6	7.5	9.5	11.7	7.3
1969	12.9	12.3	10.5	7.8	3.9	1.4	1.0	2.1	5.7	7.8	9.4	12.2	7.2
1970	13.2	12.1	10.6	8.0	3.8	1.9	1.0	2.1	5.4	7.6	9.5	11.9	7.3
1971	13.2	12.3	10.8	7.9	3.7	1.6	1.5	2.3	5.6	4.5	7.1	11.1	6.8
1972	12.5	9.7	9.7	5.5	3.5	-0.8	1.1	2.5	2.2	7.3	8.5	11.9	6.1
1973	12.9	15.3	11.3	7.7	3	2.6	2.7	2.2	5.2	8.4	10.1	12.4	7.8
1974	14.1	12.4	12.4	10.2	4.4	2.4	2.2	2.6	2.7	6.4	7.4	8.4	7.1
1975	12.9	12.4	11.1	7.8	3.7	1.4	1.9	2.4	3.9	6.7	8.3	11.0	6.9
1976	13.1	12.5	11.1	7.8	3.6	1.4	2.0	2.4	3.5	7.2	8.6	10.9	7.0
1977	13.3	13.1	11.5	8.4	3.7	2.0	2.2	2.4	3.8	7.2	8.6	10.7	7.2
1978	13.3	12.6	11.5	8.5	3.8	3.9	1.2	0.8	4.9	5.8	8.7	10.5	7.1
1979	14.2	14	11.7	5.7	3.4	2.2	0.4	0.8	3.5	7.0	8.9	11.2	6.9
1980	13.7	13.7	11.4	7.7	3.9	1.5	1.9	1.4	4.5	7.6	9.4	12.4	7.4
1981	15.5	15.1	10.5	7.7	4.7	2.9	1.6	3	4.7	8.1	9.3	10.8	7.8
1982	14.9	13.6	12.5	7	2.1	0.7	-1.7	0.4	3.9	5.5	9.5	12	6.7
1983	13	15.9	13.7	7.9	6.7	4.3	0.1	2.3	4.4	8.1	8.5	11.6	8
1984	12	12.6	8.6	8.2	2.8	-0.9	1.6	2.9	4	6	9.5	9.1	6.4
1985	11.1	11.6	11.8	9.2	5	1.3	-0.5	1.2	3.1	7.2	8.9	11.1	6.8
1986	11.6	12.2	11.3	8	5.2	0.7	0.6	2.4	4.7	5.5	8.2	9.7	6.7
1987	12.2	12.9	9.4	6.4	5.3	3.5	-0.6	3.6	4.1	5.7	9.3	10.9	6.9
1988	14	11.1	10.2	10.1	6.7	3	2.7	2.3	6.1	7.4	9.7	13.8	8.1
1989	12.1	12	12.5	11.4	7.9	3.6	1.4	1.5	2.4	6.2	9.1	11.5	7.6
1990	13.4	13.9	11.7	10.9	6.1	2.3	2.8	3.4	3.9	6.3	9	12.7	8
1991	14.9	14.7	10.2	6.2	4.5	6.4	3.5	3.3	4.1	7.4	8.4	11.1	7.9
1992	12.3	12.7	12	7.6	4.3	2.5	1	1.3	3.8	7.2	7.7	11.6	7
1993	14.7	13.6	10.3	7.6	3.3	2.2	3.3	3.1	4.7	6.2	9.1	12	7.5
1994	12.6	14.2	9.6	6.8	4.8	3.3	-0.2	0	2.6	5.4	10.2	12.7	6.8
1995	13.5	12.8	10.3	5.4	7.3	4.2	2.1	2.5	4.9	8.4	10.7	10.8	7.7
1996	13.6	10.9	10.4	6.8	5.9	2.5	2	3.2	5.5	7.4	8.1	11.1	7.3
1997	11.9	15.2	11.3	6.5	5.7	0.1	0.2	1.1	5.7	6.5	10.6	13.3	7.3
1998	14.7	14	11.2	8.8	6.8	2.7	0.9	4.4	6.7	6	8.6	12.4	8.1
1999	15.1	13.5	11.7	7	4.3	2.7	2.2	1.3	5.5	8.7	7.4	11.5	7.6
2000	11.4	13.8	13.6	7.2	4.1	0.7	1.1	2	5.6	7.5	12	12.9	7.7
2001	15.1	15	11.1	7.5	2.5	2.1	2.5	1.4	5.9	6	8.9	11.7	7.5
2002	12.9	13.6	10.6	9	4.4	2.8	0.5	0.7	3.9	6.9	11.4	12.2	7.4
2003	14.1	15.4	11.1	8.7	6.3	4.1	2.4	1.3	4.1	5.6	9	14.4	8
2004	14.4	14.4	11.3	8.2	3	2.3	1	3	4.5	8	9.6	12.4	7.7
2005	13.7	13.6	9.8	9.1	4.2	3.2	2.7	1.8	5	8.7	10.3	12.4	7.9
2006	14.1	14.1	12.2	5.1	3.3	1.4	3	1.5	5	6.9	10	11.9	7.4
2007	14.5	14.3	12.3	7.8	6.5	2.7	2.3	5.4	4.4	8.6	11.8	12.4	8.6
2008	14.4	12.5	10.2	5.8	3.3	5.2	0.8	1.5	5.2	7.9	10.1	11.7	7.4
2009	13.6	14.2	11.4	8.5	4.6	3.6	2.4	3.6	5.3	7.1	12.4	12.1	8.2
2010	15	14.9	11.7	7.8	4	2.5	1.3	2.3	5.2	8.2	10.8	12.3	8
2011	15.6	15.2	12.3	7.2	2.1	3.1	1.6	3.5	5	7.2	11.8	10.1	7.9
2012	13.1	13.1	10.8	7.9	3	3.6	1.5	1.6	4.1	6	10.3	12.9	7.3
2013	15	13.8	11.1	8	3.1	3.8	3	3.9	6.5	6.4	9.1	12.4	8
2014	13.6	13.8	13.1	8.8	5.4	4	2.6	1.6	4.9	7.2	11.5	13.5	8.3
2015	14.2	14	10.7	8.7	4.7	1.5	0.8	2.6	4	9.7	11.4	12.3	7.9
2016	14.6	14.2	13.3	10	6.3	4	4.2	3	6.4	6.4	10.2	14.4	8.9
2017	16.2	14.7	13.5	6.8	3.7	1.6	0.8	2.1	4.8	8.6	10	14.8	8.1
2018	14.9	13.5	11.4	10.2	4.3	2.7	1	2.5	4	8.5	10.4	13.5	8.1
2019	18.0	13.2	12.3	8.7	4.6	2.3	3.2	2.2	4.0	7.4	10.1	13.2	8.3