Year	Percent
1950	14.00429
1955	14.55364
1960	15.95906
1965	16.431
1970	16.08094
1975	15.21536
1980	14.30018
1985	13.44243
1990	13.03634
1995	12.39678
2000	11.88823
2005	10.96475
2010	10.57708
2015	10.06137
2020	9.50682
2025	8.87435
2030	8.29545
2035	7.78189
2040	7.31926
2045	6.8968
2050	6.5147
2055	6.17607
2060	5.88114
2065	5.6327
2070	5.42636
2075	5.25633
2080	5.1063
2085	4.98361
2090	4.88142
2095	4.80201
2100	4.74225