Year	annual %
1961	2.061099361275879
1962	2.1033196738600424
1963	2.109444628025244
1964	2.1298464258747885
1965	2.1466043529418926
1966	2.144030678355932
1967	2.1426284026979374
1968	2.1682507344811057
1969	2.175304457869686
1970	2.212888469290448
1971	2.185253238461854
1972	2.14883778803771
1973	2.1945184004669613
1974	2.288311791757053
1975	2.3092494727234794
1976	2.2957440505925035
1977	2.2671466342376334
1978	2.3579936463680156
1979	2.505537145941929
1980	2.4065260791492165
1981	2.39631056250316
1982	2.4892852974194284
1983	2.294495173009949
1984	2.1391905774192423
1985	2.128392968715204
1986	2.120894438668657
1987	2.1386458390079355
1988	2.0560313216381587
1989	2.0304559440524628
1990	2.0333521165330666
1991	2.1044828059251017
1992	2.0604499633561204
1993	2.0467141669445255
1994	2.0096423843666997
1995	2.083108749453217
1996	2.1999072338980454
1997	2.104019110540321
1998	2.06073193463439
1999	2.0820091301650763
2000	2.111353235407549
2001	2.036020956352445
2002	2.03090551870595
2003	2.032103140761052
2004	2.041194997006613
2005	2.0298307842045773
2006	2.047027644442906
2007	2.132294335417157
2008	2.0035427619186237
2009	1.9883447888807524
2010	1.9721675152675573
2011	1.9447396433639454
2012	1.9414335097273323
2013	1.9346930464978271
2014	1.8974613083204304
2015	1.8703299390673322
2016	1.835595068874298
2017	1.7879623515258345
2018	1.7657987103203396
2019	1.7495318040700312
2020	1.7255669119238064
2021	1.6575898270962455
2022	1.5933368350992794
2023	1.5711499464587746