Year	annual %
1961	6.93705495026615
1962	6.949297379102548
1963	6.988334349592599
1964	6.9754090858680255
1965	6.908510113884987
1966	6.836431160023474
1967	7.813938650084386
1968	12.185142473474956
1969	12.746604173644153
1970	10.821581312946192
1971	7.691193068527004
1972	6.1278663520042285
1973	5.946914165389007
1974	2.321933941609686
1975	2.5256830515445627
1976	2.5645518169482964
1977	2.5641678266674313
1978	2.5452487826614014
1979	2.531639611228181
1980	2.6462463997094563
1981	4.677592064435034
1982	5.316452754413663
1983	5.287637683116089
1984	5.266851623804353
1985	5.243882612130845
1986	5.167648178640969
1987	5.063401750182911
1988	4.830022789588565
1989	3.694536184588854
1990	2.847709739341906
1991	2.6811434082431798
1992	2.535112017927818
1993	2.4260498381816347
1994	2.3172253148521778
1995	2.211553884225089
1996	2.128984376566743
1997	2.0647631472234846
1998	2.0118805949197562
1999	1.7567982183453734
2000	1.492787429656634
2001	1.104481255854157
2002	0.8975556357225556
2003	0.727466933458637
2004	0.6130427328135999
2005	0.5265559147479264
2006	0.4594386420969601
2007	0.36757659595946035
2008	0.2613643675104356
2009	0.24536753524391047
2010	0.3160446112237914
2011	-0.19868568357888985
2012	-0.8424175080176788
2013	-1.0442609369288636
2014	-1.249787491374705
2015	-1.4576358576958184
2016	-1.6636093920555972
2017	-1.8603021378262499
2018	-2.0535176178438443
2019	-2.2812289258195175
2020	-2.4972057875251052
2021	-2.7192551820078728
2022	-0.6930584780973835
2023	1.4628992202060982