Year	Percent
1950	13.83481
1955	17.09498
1960	16.65617
1965	16.06301
1970	15.9375
1975	15.48626
1980	14.88149
1985	14.18924
1990	12.41003
1995	11.04677
2000	10.6629
2005	10.65055
2010	9.4953
2015	8.43082
2020	7.95241
2025	7.63634
2030	7.33464
2035	6.95359
2040	6.54784
2045	6.17096
2050	5.9085
2055	5.76231
2060	5.6626
2065	5.55453
2070	5.42587
2075	5.30793
2080	5.22499
2085	5.1909
2090	5.17951
2095	5.16585
2100	5.13407