Year	annual %
1961	2.21694196989598
1962	2.214765337763931
1963	2.2140100037189034
1964	2.2183702199448803
1965	2.2211370459431263
1966	2.2422244729322394
1967	2.334376862146997
1968	2.3776044563549688
1969	2.432397218075976
1970	2.488943934913572
1971	2.4808468759228233
1972	2.519018756286936
1973	2.510546765796877
1974	2.483984603872592
1975	2.4556083780955396
1976	2.4855205175977004
1977	2.454931713982173
1978	2.424671462929445
1979	2.3916350955233665
1980	2.343066743554699
1981	2.2838446876875667
1982	2.2380000574033456
1983	2.2013972154889627
1984	2.1683477599979173
1985	2.154817252974995
1986	2.1378228358491227
1987	2.1527581199780514
1988	2.1838917345061475
1989	2.2103431914079015
1990	2.244755768747652
1991	2.2788906894772216
1992	2.2974795988023717
1993	2.335012691412792
1994	2.7632252511540116
1995	2.822167490601004
1996	2.8276244702620947
1997	2.8158145921513054
1998	2.7836912305068835
1999	2.7341625038098134
2000	2.672848721523026
2001	2.6250663218670924
2002	2.586255590017972
2003	2.55530160286835
2004	2.544696426881076
2005	2.0797788306543543
2006	2.064735273500331
2007	2.047001292388416
2008	2.0111838075761774
2009	1.985166887035826
2010	1.934388535795048
2011	1.8524317035045825
2012	1.7638487211060778
2013	1.6918656870104891
2014	1.630076687793099
2015	1.5764588740486338
2016	1.5577017814703389
2017	1.5404491716616187
2018	1.4945752513466475
2019	1.452859039755621
2020	1.3934585167009266
2021	1.3159189166417014
2022	1.262158168572276
2023	1.2551967399282529