Year	annual %
1961	2.0137305616902097
1962	0.6650541384618691
1963	4.919829779887493
1964	-0.3665028581218195
1965	2.1672088362046225
1966	2.6449268298169812
1967	2.434226820681104
1968	1.0650990285021322
1969	1.7794617790069651
1970	4.358263178428402
1971	8.232657591742495
1972	6.268776819000436
1973	11.200394489952131
1974	50.10796879462936
1975	2.2629981494588094
1976	6.1935443240511034
1977	8.448427270686636
1978	6.086675328334451
1979	21.945579254879547
1980	28.027239538162405
1981	12.606375912640289
1982	4.28450348163129
1983	3.635256583013799
1984	42.55125659436919
1985	10.420210832766202
1986	-1.1768232399454064
1987	37.44452465439235
1988	18.497659973323238
1989	89.16312358903525
1990	41.7406571272428
1991	21.449616427425838
1992	28.244062356827044
1993	31.645824152682394
1994	62.89068458438993
1995	51.759901832726456
1996	115.52471793332924
1997	33.947459925683006
1998	18.890286702571586
1999	26.19271006155546
2000	29.4528251104893
2001	7.996904056204585
2002	33.0228760786371
2003	34.93375573873692
2004	33.95372433853461
2005	29.60405935129765
2006	17.904315549063583
2007	15.448477757966941
2008	30.132452853435183
2009	7.831666360026659
2010	45.943268698589264
2011	28.149190952885363
2012	14.059430064286076
2013	35.50267463483354
2014	40.44049010655482