Year	annual %
1960	5.11890951276099
1961	1.95889088150075
1962	-3.8461538461533
1963	1.91666666666659
1964	5.39656582175021
1965	-3.87897595034945
1966	3.79338175948378
1967	6.45412130637526
1968	2.84879474068662
1969	-1.98863636363599
1970	4.63768115941983
1971	5.6094182825485
1972	2.09836065573833
1973	20.3596660244059
1974	15.5282817502668
1975	11.4649681528663
1976	11.4285714285715
1977	11.9658119658116
1978	4.80916030534371
1979	4.55207574654038
1980	19.2964123998608
1981	18.3941605839417
1982	14.3033292231811
1983	6.1272923408846
1984	9.22951819475499
1985	17.2529313232832
1986	36.0634920634916
1987	59.4843677088198
1988	34.562211981567
1989	11.3992172211349
1990	19.3968672229543
1991	9.00000000000003
1992	11.0091743119265
1993	13.2231404958679
1994	15.3284671532846
1995	7.97995780590686
1996	8.2498900991551
1997	1.88611136179086
1998	-0.797165633303916
1999	-3.70370370370365
2000	-3.84615384615379
2001	2.99999999999995
2002	-0.130505282417402
2003	5.79682944905841
2004	4.43314136719839
2005	7.24034939348533
2006	10.0241105377571
2007	3.90770950443613
2008	15.7453252219709
2009	2.92089711805361
2010	4.39741383150071
2011	4.7531638888566
2012	36.7022953364135