Year	Percent
1950	9.41911
1955	9.83545
1960	9.72064
1965	9.05809
1970	9.42857
1975	8.745
1980	11.98167
1985	11.63311
1990	10.46189
1995	7.07116
2000	6.75286
2005	7.69999
2010	6.83288
2015	6.30676
2020	5.54118
2025	5.13921
2030	5.43136
2035	5.29199
2040	5.16631
2045	4.96342
2050	4.79386
2055	4.74522
2060	4.82094
2065	4.91387
2070	4.9317
2075	4.87853
2080	4.81343
2085	4.78864
2090	4.81211
2095	4.8455
2100	4.84745