Year	annual %
1961	2.6289936633916664
1962	2.658366526281798
1963	2.6868735628146174
1964	2.719072398703418
1965	2.7528606906083577
1966	2.773156799640646
1967	2.806927415159885
1968	2.8414042306242404
1969	2.8627726390713324
1970	2.881445983484292
1971	2.9039215317997313
1972	2.927123926407481
1973	2.9399728351387235
1974	2.941144909547458
1975	2.9544992996345156
1976	2.954363668809863
1977	2.9400347183362117
1978	2.825979984394347
1979	2.433933242084792
1980	1.9738900916980822
1981	1.8382707870297672
1982	1.8806729056260136
1983	1.9210411641095635
1984	1.9566205126038512
1985	1.9750129553705964
1986	1.9924838318333367
1987	1.989104853501896
1988	1.9868572687980386
1989	1.994807969713794
1990	2.139418701434305
1991	2.1361163278257576
1992	2.134418756068434
1993	2.1150576241484313
1994	2.0719971834903954
1995	2.0336063726204263
1996	1.9995505763192238
1997	1.9709353724656542
1998	1.941835723470244
1999	1.9523612239227444
2000	2.075957439563839
2001	2.191229097002165
2002	2.1894224866957397
2003	2.1387756509083546
2004	2.0891094757037494
2005	2.0463573082343016
2006	2.020545586328474
2007	2.017260913478577
2008	2.034742560801203
2009	2.025578762871748
2010	2.1435154872851534
2011	2.2209860506183667
2012	2.234132424366288
2013	2.2559399292764537
2014	2.2638713031477056
2015	2.250397217649565
2016	2.2885428130355097
2017	2.3137925496927494
2018	2.254712974043209
2019	2.2014720614511845
2020	2.1876573340567735
2021	2.174549899113305
2022	2.1513738953250017
2023	2.1331246931126575