Year	Percent
1950	11.60029
1955	11.99324
1960	11.92641
1965	13.16321
1970	13.15449
1975	12.87598
1980	13.17328
1985	14.19229
1990	12.86864
1995	11.77722
2000	11.24476
2005	10.78392
2010	10.26846
2015	9.51962
2020	8.70611
2025	8.3348
2030	7.78865
2035	7.24382
2040	6.72763
2045	6.30135
2050	5.96162
2055	5.70283
2060	5.4851
2065	5.30204
2070	5.12931
2075	5.00462
2080	4.90872
2085	4.84888
2090	4.81066
2095	4.77819
2100	4.75356