Year	annual %
1961	3.1720424804038605
1962	3.219852530226566
1963	3.27617292981123
1964	3.3035436054022336
1965	3.3330645031186816
1966	3.333201519033667
1967	3.329709411185526
1968	3.3266404347946206
1969	3.297279371243621
1970	3.233725040224653
1971	3.0469437407650353
1972	2.980441153207569
1973	2.9705236441543104
1974	2.9335019254859587
1975	2.881629407979878
1976	2.8127431531126046
1977	2.8054783371136587
1978	2.82148987721711
1979	2.7852167121699827
1980	2.7931516147838114
1981	2.918776099855433
1982	2.9180492965255302
1983	3.0202556001749206
1984	3.133240489368531
1985	3.537835022816438
1986	4.352101891378165
1987	4.562023379522625
1988	4.51898809212765
1989	4.392617115223611
1990	4.106003041483585
1991	3.5470157908731856
1992	2.9726482488582047
1993	2.721094665739983
1994	2.629443703136207
1995	2.5346076759306824
1996	2.4030020827761565
1997	2.259344930539681
1998	2.1082749543580053
1999	1.9678821263693178
2000	1.8101623292566678
2001	1.7206098234553275
2002	1.829719299044168
2003	1.8662520459822947
2004	1.8668440924586183
2005	1.8613332399752838
2006	1.86818148741063
2007	1.9070581260828265
2008	2.01672235144201
2009	2.0570864929356425
2010	2.050150460034685
2011	2.108455376035565
2012	2.163963020258934
2013	2.1816796858954883
2014	2.3865715124131177
2015	2.8731533422612863
2016	1.7602140529582897
2017	1.1632500533664545
2018	1.9894996635793318
2019	2.0472657656091844
2020	1.9653047455294559
2021	1.7282073542958645
2022	1.5577491240873016
2023	1.5712435818251385