Year	annual %
1961	8.484005563282336
1962	9.401709401709402
1963	0.234375
1964	10.093530787217459
1965	4.530973451327434
1966	4.470030477480528
1967	2.2366288492706645
1968	23.747622067216234
1969	17.371252882398156
1970	-5.588299497926217
1971	11.07514450867052
1972	17.631140716069943
1973	26.11927092549991
1974	18.633366072681355
1975	8.33826138379657
1976	22.194323144104803
1977	21.701063164477798
1978	31.61797092937895
1979	19.65530704445312
1980	21.56341770381765
1981	2.622799953985966
1982	56.798565183275414
1983	31.629491945477074
1984	28.31073374730706
1985	71.09700176366843
1986	88.40061023378551
1987	64.01796344281813
1988	56.876297628642035
1989	74.1981798077741
1990	73.99875393545464
1991	76.21328900335561
1992	33.238357588456914
1993	21.922502300787645
1994	8.808349075423811
1995	19.6147186069182
1996	29.6479534577533
1997	47.13861384620054
1998	11.265844282987624
1999	37.7996807093934
2000	12.075808523188854
2001	31.218959315151245
2002	29.088607565939633
2003	22.022590320554855
2004	20.15133194962388
2005	31.14542540092526
2006	21.660547821925856
2007	17.10933172217011
2008	26.538996313804187
2009	34.52962528887426
2010	24.15489336582022
2011	29.62799220540015
2012	21.984690436063886
2013	10.676316045456533
2014	23.915452909160162
2015	-99.88824335381811
2016	17.861897706294712
2017	6.990975136338813
2018	14.451124041743324
2019	14.309255200269414
2020	38.179941059849334
2021	22.05201918577734
2022	41.74420871191486
2023	32.83245635931501