Year	annual %
1961	4.405074180164503
1962	4.404484356871216
1963	5.344165467203779
1964	8.916539849959118
1965	8.839041944902146
1966	8.769836950095131
1967	8.74553809975374
1968	8.740772430830699
1969	8.667882633266096
1970	8.617478591263637
1971	8.55964398250466
1972	8.519379227184963
1973	8.01414681044008
1974	6.120610776463286
1975	6.104051495292719
1976	6.142389273541993
1977	6.1749887810163475
1978	6.202810889411532
1979	6.234407596202035
1980	6.275768482890473
1981	6.240607164010043
1982	6.252858362336995
1983	6.419266492384305
1984	6.779820736641641
1985	6.82124958843455
1986	6.857079222958459
1987	6.877193827341409
1988	6.897313270505564
1989	6.8872922594631705
1990	6.883772904312535
1991	6.867393577621779
1992	6.723935654739495
1993	6.183121831463849
1994	5.2734872231930545
1995	5.037490152699626
1996	4.9738959894440535
1997	4.92887817962702
1998	4.90998403681353
1999	4.8727648016228695
2000	4.809358171700598
2001	4.750765999408289
2002	4.694725696106854
2003	4.591574465144912
2004	4.332180681126844
2005	4.359495256789058
2006	4.416585106587202
2007	4.4577894431675595
2008	4.460730685072789
2009	4.443951552033532
2010	4.412243420847514
2011	4.38583159000324
2012	4.365139469554459
2013	4.2954946573829975
2014	4.191405720230415
2015	4.075764597177745
2016	3.962237171257426
2017	3.853630488461453
2018	3.742600951095837
2019	3.655721231651833
2020	3.6078858888448098
2021	3.5462481657610923
2022	3.4636847955036023
2023	3.4184969179557196