Year	Percent
1960	-0.87936
1961	5.64133
1962	5.45382
1963	8.3275
1964	4.02799
1965	4.69182
1966	8.06404
1967	9.62569
1968	10.32853
1969	9.22194
1970	9.14794
1971	6.85606
1972	6.53628
1973	6.85635
1974	3.27909
1975	3.16877
1976	2.51896
1977	1.10238
1978	1.35345
1979	0.77907
1980	0.66352
1981	0.71062
1982	0.7736
1983	0.5681
1984	0.68838
1985	0.79046
1986	0.7984
1987	1.12487
1988	0.9265
1989	0.95158
1990	1.02494
1991	1.38524
1992	1.9888
1993	0.64083
1994	0.44071
1995	0.76165
1996	0.9064
1997	0.85488
1998	0.92288
1999	2.86497
2000	1.36029
2001	2.54018
2002	2.71205
2003	4.61502
2004	2.35473
2005	2.03945
2006	2.7072
2007	1.53354
2008	1.7024
2009	2.07238
2010	1.07332
2011	1.31588
2012	0.9327
2013	1.01169
2014	1.33774
2015	1.9433
2016	1.68934
2017	1.2624
2018	2.51423
2019	1.265
2020	3.627
2021	3.16918