Year	annual %
1961	5.887025028191947
1962	6.066939939311219
1963	5.945361164253105
1964	5.739691399136054
1965	5.615066943753462
1966	5.546677859723173
1967	7.090144996109518
1968	7.543145661357682
1969	7.317285877706825
1970	7.088248573445158
1971	5.725159401232851
1972	5.206030516166749
1973	5.008726784408346
1974	4.870751554610823
1975	4.755847475633084
1976	5.046443533789224
1977	5.0318949769186165
1978	4.875475794314383
1979	4.747791334300016
1980	4.6723843980497195
1981	4.491089137885024
1982	4.337966077856972
1983	4.155196283155218
1984	3.807082638974045
1985	3.4422274862972086
1986	3.735957326871283
1987	3.7714278542641475
1988	3.607585836159689
1989	3.457351385699715
1990	3.308648726710101
1991	2.5057814849985114
1992	2.1639025776719634
1993	2.0980480430267545
1994	2.0535592270344636
1995	2.017184418444796
1996	1.4919760857453304
1997	1.2461522421925673
1998	1.0255679836818699
1999	1.0123167449191843
2000	1.134284407651176
2001	1.167089278070755
2002	1.0260401227104203
2003	0.9569638464046533
2004	0.8293556062544319
2005	0.6345498402581138
2006	0.7499161233254168
2007	0.6314916718186362
2008	0.8841888220857503
2009	0.6394034007549647
2010	0.6215669831447053
2011	0.7531050963748667
2012	0.43778826636442036
2013	0.3672134273584243
2014	0.5400707027375163
2015	0.43790453258211504
2016	0.3086128063264598
2017	0.20860461971728161
2018	0.3795185342827299
2019	0.312269897922803
2020	0.11821840259212243
2021	-0.12875935950416484
2022	-0.17151835813942687
2023	0.11308522380596793