Year	annual %
1961	8.944939142992334
1962	8.654838686774138
1963	8.478070672220351
1964	8.325513714417289
1965	8.118594076377024
1966	7.9024149456364405
1967	7.6788915520241074
1968	7.45112775379236
1969	7.21889694859814
1970	6.987135991781505
1971	6.69227739092048
1972	4.2046296217788734
1973	3.775930934980882
1974	3.698246865785669
1975	3.6385713649466163
1976	3.5692062449469466
1977	3.509846243419058
1978	3.4733902168716533
1979	3.4594658335206847
1980	3.4610087355448322
1981	3.4655857334627083
1982	3.539119136535239
1983	3.6076778258827296
1984	3.619289684348528
1985	3.6327543472431967
1986	3.6323589560772973
1987	3.603245090521546
1988	3.5425373707818597
1989	3.461745761014423
1990	3.3671719452191966
1991	3.204064799286098
1992	3.499267544198909
1993	3.3773107497264006
1994	3.274507412088429
1995	3.180903317306301
1996	3.0918062216592936
1997	2.998156945609495
1998	2.911768183842981
1999	2.838464251689856
2000	2.7803153645318117
2001	2.7059194923062915
2002	2.499695357687874
2003	2.3958393908867968
2004	2.309676550876396
2005	2.2262293640861963
2006	2.146377817000887
2007	2.0730508120422884
2008	2.0109872204940658
2009	1.9606975376183788
2010	1.9324239964865764
2011	1.8319803340875314
2012	1.7275358026080667
2013	1.688290675658921
2014	1.6360522975000606
2015	1.573509212267661
2016	1.5012746269382349
2017	1.4174628965365204
2018	1.3341932036582551
2019	1.2674328820786986
2020	1.2304524645802595
2021	1.210065548216283
2022	1.1927734839683872
2023	1.1547057356108832