Year	annual %
1961	2.81015139962967
1962	13.560758554931668
1963	1.9311502938706968
1964	5.583012996522058
1965	12.62135922330097
1966	9.213362068965516
1967	18.40862640073296
1968	16.118088209035175
1969	12.122610077400173
1970	13.573191917344793
1971	7.966026647345329
1972	26.235925732607562
1973	20.307746832452228
1974	45.788633852952
1975	25.951807634667517
1976	23.34656880439578
1977	28.777828358370726
1978	27.21840202671425
1979	16.79567587593945
1980	34.40203014631328
1981	15.845948953100239
1982	20.452577582129734
1983	26.000338278644954
1984	25.250496198210808
1985	20.56037205029569
1986	11.83620662285297
1987	11.570175202022424
1988	21.985005337061857
1989	21.368601757580688
1990	26.124426830190494
1991	13.17810337838068
1992	19.443668534469268
1993	30.328806214552873
1994	12.232450434591605
1995	9.163453003798509
1996	10.19707821609762
1997	8.234069185578557
1998	10.505346211630217
1999	13.435496254686132
2000	18.960029202178003
2001	23.536479315668977
2002	18.5107981571375
2003	7.808539499092665
2004	10.723235049063426
2005	11.37611232650035
2006	7.285060964701703
2007	12.433260176008037
2008	25.181802889200235
2009	8.613515470424524
2010	13.470884226602898
2011	-7.809881231172332