Year	annual %
1961	1.177587844254511
1962	1.5581002440397973
1963	16.245841035120147
1964	16.236543751689485
1965	8.15047879616963
1966	-0.03288724733739786
1967	13.546411580119443
1968	9.531079364371838
1969	10.867729497105534
1970	7.749626054160205
1971	16.728269941576247
1972	19.692105647161828
1973	19.677537336177995
1974	35.6224946646225
1975	53.288967172295685
1976	23.32829447203432
1977	25.634612557561116
1978	15.338771728147726
1979	7.494564189179926
1980	17.299821831450256
1981	13.44898258737571
1982	8.545853579061365
1983	23.600653363941372
1984	18.25600524608526
1985	9.659147539636852
1986	12.92490625883084
1987	18.580189521396523
1988	20.380015475743356
1989	41.93086946433386
1990	64.88039775121288
1991	47.55361372417882
1992	17.74228665077945
1993	25.547559370413893
1994	68.89103570907328
1995	36.561494750653566
1996	68.80744970891108
1997	55.54856795047475
1998	7.377121445506578
1999	21.673557363188284
2000	33.73408592007101
2001	10.73487032458565
2002	14.639820817446633
2003	62.405073898922105
2004	49.95148725167171
2005	47.439851307888354
2006	72.73615492629527
2007	33.89354996736611
2008	28.8009048093836
2009	23.33156115394321
2010	23.546177131465402
2011	49.204572934460714
2012	53.289723807918655
2013	58.84307066515176