Year	Percent
1950	13.55711
1955	17.2258
1960	17.04109
1965	16.36726
1970	14.94649
1975	14.12317
1980	14.04472
1985	13.11168
1990	11.50078
1995	10.8314
2000	9.43222
2005	8.1147
2010	6.28868
2015	7.88119
2020	7.3646
2025	7.04397
2030	6.48331
2035	5.59966
2040	4.84591
2045	4.48645
2050	4.52126
2055	4.69171
2060	4.72971
2065	4.52763
2070	4.25265
2075	4.10485
2080	4.16406
2085	4.33403
2090	4.46384
2095	4.45911
2100	4.35061