Year	Percent
1950	12.03893
1955	13.23555
1960	15.72498
1965	15.73465
1970	15.67126
1975	15.67856
1980	16.30307
1985	16.44518
1990	16.11252
1995	15.0097
2000	13.38582
2005	13.45193
2010	12.20567
2015	13.35721
2020	11.72901
2025	10.0487
2030	9.57867
2035	8.95984
2040	8.53552
2045	8.08809
2050	7.48216
2055	6.892
2060	6.43439
2065	6.13096
2070	5.91741
2075	5.723
2080	5.51962
2085	5.32324
2090	5.1631
2095	5.0668
2100	5.01852