Year	annual %
1961	8.471429553737194
1962	2.8526148969889067
1963	11.617873651771957
1964	9.939260077305356
1965	10.271220492214967
1966	28.75427009792758
1967	14.652610725909154
1968	14.100586238815179
1969	8.464034613304488
1970	9.715781600598355
1971	9.996136978208012
1972	14.506466140561086
1973	21.149960308869165
1974	19.074920701106464
1975	15.879189594797399
1976	18.268452464465717
1977	14.747590889180904
1978	16.79828223786234
1979	17.846637797205652
1980	12.111810213832989
1981	29.646159078962285
1982	5.955447433695859
1983	2.400300131307447
1984	7.458563535911603
1985	7.177146052245778
1986	8.590869616391556
1987	8.50209307980068
1988	12.232643782432381
1989	13.391340745837082
1990	8.09337217122333
1991	3.882946360228455
1992	6.400979417866064
1993	1.90509505055276
1994	4.6305734592779615
1995	4.829985444928873
1996	4.045237266891296
1997	4.372122850010307
1998	2.4205408779269444
1999	5.362270333116119
2000	6.623295814247311
2001	125.03100376719428
2002	2.6555256164049816
2003	0.5106671284924307
2004	5.463107879847032
2005	9.645191141484858
2006	12.479492080570397
2007	-25.55068614183165
2008	14.921768258939384