Year	annual %
1981	25.57143459381982
1982	27.978836263042687
1983	17.8301609619945
1984	14.97312869285673
1985	21.706161871604117
1986	14.004696658244924
1987	10.437425686198985
1988	26.60530286372838
1989	14.080244658573928
1990	9.738274681220767
1991	10.237606616820463
1992	10.584784155803579
1993	22.32350740607031
1994	10.889322082652086
1995	9.810593178252415
1996	17.148525500567978
1997	14.765650467172764
1998	15.534720285862965
1999	-5.144148180568074
2000	1.3742048570694636
2001	17.156270209888884
2002	8.805491614187908
2003	5.98064089726909
2004	3.3813347259394653
2005	9.135618392051013
2006	35.306099856937266
2007	16.350333418474396
2008	19.65226642048013
2009	7.9893297713121845
2010	22.366189653808398
2011	3.1982859130857575
2012	7.343280765396923
2013	21.163799559477837
2014	3.9510460110394092
2015	12.558247347947438
2016	-4.838594710809402
2017	25.526073631431345
2018	10.694077631778987
2019	-8.994942823875379
2020	17.118828029707792