Year	Percent
1950	9.9695
1955	10.02764
1960	7.46993
1965	6.80105
1970	9.96158
1975	11.11665
1980	9.9654
1985	8.34186
1990	8.20401
1995	8.92156
2000	10.045
2005	10.62577
2010	8.60714
2015	6.31922
2020	5.34179
2025	5.79479
2030	6.14557
2035	5.63136
2040	5.15211
2045	4.8355
2050	4.65971
2055	4.75448
2060	4.97408
2065	5.09586
2070	5.05729
2075	4.97072
2080	4.94637
2085	5.01847
2090	5.1372
2095	5.21401
2100	5.19085