Year	Percent
1950	10.04824
1955	9.36968
1960	8.92227
1965	10.19252
1970	11.07639
1975	13.12763
1980	12.88916
1985	12.86321
1990	12.02659
1995	12.38038
2000	13.47886
2005	11.13362
2010	8.64822
2015	7.50509
2020	8.85621
2025	10.76079
2030	9.7195
2035	8.60662
2040	7.77895
2045	7.39188
2050	7.41139
2055	7.60814
2060	7.6909
2065	7.39219
2070	6.87787
2075	6.4942
2080	6.34292
2085	6.34487
2090	6.3618
2095	6.272
2100	6.07639