Year	Percent
1950	12.19356
1955	13.89023
1960	15.66405
1965	16.4159
1970	16.02916
1975	15.49781
1980	14.43127
1985	12.51786
1990	12.10533
1995	11.43663
2000	12.90055
2005	12.42766
2010	10.93247
2015	9.55311
2020	9.35378
2025	9.10832
2030	8.66855
2035	8.16124
2040	7.68046
2045	7.27295
2050	6.96673
2055	6.69923
2060	6.44312
2065	6.18814
2070	5.96921
2075	5.79114
2080	5.65502
2085	5.54957
2090	5.45389
2095	5.35577
2100	5.26791