Year	Percent
1950	13.65002
1955	20.15324
1960	19.91407
1965	18.38932
1970	16.20403
1975	16.07517
1980	15.39554
1985	14.47762
1990	13.56825
1995	12.86304
2000	10.32451
2005	8.97171
2010	8.12841
2015	8.04659
2020	7.44869
2025	6.79275
2030	6.20667
2035	5.74091
2040	5.41155
2045	5.24131
2050	5.13927
2055	4.99699
2060	4.84285
2065	4.71304
2070	4.64515
2075	4.63224
2080	4.6467
2085	4.6368
2090	4.60096
2095	4.5541
2100	4.52087