Year	annual %
1961	6.704130083354147
1962	6.603749723721082
1963	6.433375042565125
1964	6.230169246763314
1965	6.049183895346443
1966	5.89614792100078
1967	5.727395080977509
1968	11.626896869105053
1969	17.04009262234531
1970	16.295598946888944
1971	14.47552737480417
1972	13.00707828314856
1973	11.808178555704114
1974	10.810398605259122
1975	9.944668557657325
1976	12.37396586474692
1977	14.308780218596398
1978	13.282627263602908
1979	12.311291233163656
1980	11.244397613466834
1981	8.118888805140806
1982	5.7002873877021525
1983	5.525605353064578
1984	5.284352532720375
1985	5.021702810308456
1986	6.036999066084389
1987	6.867192428571238
1988	6.434969060283321
1989	6.045656764552149
1990	5.685723145012248
1991	5.356106074770667
1992	5.045482176753435
1993	4.749269727230954
1994	4.459240058059455
1995	4.219395549923739
1996	5.765777985304597
1997	7.087214249364488
1998	6.734077996161243
1999	6.40725065907511
2000	6.112729361045069
2001	5.837919484954372
2002	5.574400906962711
2003	5.327679965644318
2004	5.098092343550252
2005	7.432144504653365
2006	13.95183249077052
2007	18.580684625119805
2008	17.836556783290785
2009	13.847739603762948
2010	6.350900859779109
2011	1.4943451764655709
2012	1.4267617834044226
2013	1.370981706375602
2014	1.3189869012851856
2015	1.2615593737863697
2016	1.2029512363832178
2017	1.1484108035024472
2018	1.1066339467654978
2019	1.0872044028123262
2020	1.1156707533573191
2021	1.1227494046699844
2022	1.0871889754475947
2023	1.0682662165154435