Year	annual %
1961	5.481276043482473
1962	5.829317430641845
1963	6.142005798104108
1964	6.155657487997533
1965	6.153850817990308
1966	6.171813779253721
1967	6.1896859312603265
1968	6.210495446605722
1969	6.214224045729359
1970	6.241565247375864
1971	8.802396981939326
1972	8.7472257205598
1973	8.655687102345572
1974	8.575698846805176
1975	8.478119505439457
1976	7.629432202749145
1977	5.3036503944589235
1978	5.4333957584048305
1979	5.4939080305197825
1980	5.933915397856215
1981	6.161833609276501
1982	5.005859304760501
1983	4.653358779844536
1984	5.361372693703239
1985	5.526725001717175
1986	5.529786069946323
1987	5.303609452250489
1988	4.564679903047307
1989	4.489596150542511
1990	4.491867048173233
1991	4.439236067197085
1992	4.3718492317961894
1993	4.326138862778209
1994	4.264109220257813
1995	4.175124132432802
1996	4.094161911081325
1997	4.019248270392846
1998	3.9894424562347415
1999	3.9847353336820697
2000	3.9578081671924314
2001	3.9290302863102116
2002	3.969565342802016
2003	4.004695417618591
2004	4.0083108901886755
2005	3.979016470720194
2006	3.951597640808658
2007	4.00022754976239
2008	4.043826850380633
2009	4.039090860339804
2010	4.031569928266443
2011	3.9978134813264545
2012	3.968114178179899
2013	3.951648615806554
2014	4.1589581578997565
2015	4.2567195545392265
2016	4.0873299582026625
2017	3.911718902077358
2018	3.82837807549289
2019	3.8230468784658385
2020	3.745673450988708
2021	3.6521762191160447
2022	3.599127785152541
2023	3.577190786037833