Year	annual %
1961	2.432904522761523
1962	2.3676222757153207
1963	2.3439667671949675
1964	2.307416154355929
1965	2.2673556091634905
1966	2.249443110474628
1967	2.2284479601286256
1968	2.1998427157000564
1969	2.1724037743523805
1970	2.185329252643308
1971	2.1411007420019317
1972	2.1254208123930254
1973	2.162336013816376
1974	2.2096502022065154
1975	2.1570004635104185
1976	2.079072940301835
1977	2.0750582011768075
1978	2.0740568146407634
1979	2.0585883142660224
1980	2.033518819811711
1981	2.0932494764077725
1982	2.10718672116359
1983	2.0767873683057987
1984	2.043030284705626
1985	2.0049786670413994
1986	1.988796294857671
1987	1.9756909283185489
1988	1.9613761389720004
1989	1.9273529667464313
1990	1.8838311003787775
1991	1.8187577001347777
1992	1.632186829093533
1993	1.597564757526497
1994	1.5837737486607641
1995	1.5492079599160773
1996	1.489269536632233
1997	1.4220820953641378
1998	1.378115353346389
1999	1.3692487137448217
2000	1.3466468981516686
2001	1.3087316977070882
2002	1.2759551881174473
2003	1.2287921082729196
2004	1.2091591746034285
2005	1.2235923480231377
2006	1.222209317886207
2007	1.1901612579141687
2008	1.1736148836157934
2009	1.1919678157258913
2010	0.4296495991451571
2011	1.3081413160317232
2012	1.2807737028339161
2013	1.2594824300377767
2014	1.2396386789084972
2015	1.2157970630095452
2016	1.1926029190680925
2017	1.17019595911431
2018	1.1476021589791883
2019	1.1250197260364365
2020	1.1004150527232597
2021	1.0755150385612433
2022	1.0536956642986972
2023	1.0293060608460942