Year	Percent
1950	9.19331
1955	10.01904
1960	8.50502
1965	9.95497
1970	10.71293
1975	13.77217
1980	13.34078
1985	12.17784
1990	10.74187
1995	10.55179
2000	12.10668
2005	13.03685
2010	10.68342
2015	9.26023
2020	8.04897
2025	8.35164
2030	8.56581
2035	8.26861
2040	7.4362
2045	6.56442
2050	6.10729
2055	6.09163
2060	6.12769
2065	5.97869
2070	5.63804
2075	5.27813
2080	5.09532
2085	5.09618
2090	5.14704
2095	5.09926
2100	4.96293