Year	annual %
1961	10.667097425137342
1962	10.45197189454143
1963	10.52405520180156
1964	10.501567200293977
1965	10.425596490423914
1966	9.071928710297357
1967	9.598113866148623
1968	8.421763565749458
1969	8.981662576940153
1970	-5.649649519447806
1971	1.6265087401548044
1972	-3.4973359325786078
1973	7.567568823270236
1974	-16.754229075146228
1975	-14.803126311448992
1976	5.185184970510861
1977	9.154929220860609
1978	14.179520138522776
1979	26.139295768689053
1980	6.495281921022865
1981	-9.226405079956407
1982	6.698897757049053
1983	3.597051867941076
1984	14.171148623475077
1985	4.829180114868166
1986	1.797000227449459
1987	2.9845193440170164
1988	2.3097076609602567
1989	6.727329799787967
1990	-1.5962490870755346
1991	-4.181785021995765
1992	-3.825582297063008
1993	0.3078065960118437
1994	3.1489159720018876
1995	4.378752034825013
1996	4.223530362241391
1997	1.2877532054979923
1998	4.716798554963006
1999	7.144103906771406
2000	4.148419307542667
2001	2.626009826834249
2002	2.7049562473102924
2003	-1.2649166761237183
2004	0.8823737445183184
2005	3.3960842053601112
2006	2.516592217127055
2007	1.4460999123575817
2008	-2.323648070418514
2009	-4.175428056473422
2010	1.5386624869383496
2011	0.6131707358906482
2012	2.9979032065597266
2013	-2.8633092572608945
2014	1.8472608434884563
2015	0.9967586105941137
2016	-0.9619087768585359
2017	2.799518639344953
2018	2.6298898599393254
2019	-1.3572652092889825
2020	-21.42346306584875
2021	15.40314894278481
2022	10.782013200150288
2023	2.6390559807510243