Year	Percent
1950	15.81509
1955	15.78158
1960	16.51791
1965	16.8999
1970	17.21817
1975	19.93693
1980	19.33549
1985	17.91131
1990	17.04143
1995	16.42091
2000	15.70906
2005	15.39441
2010	15.09123
2015	14.07379
2020	12.91494
2025	12.15235
2030	11.64088
2035	11.17982
2040	10.6482
2045	10.05783
2050	9.45829
2055	8.94342
2060	8.49757
2065	8.11591
2070	7.73425
2075	7.35191
2080	6.98017
2085	6.64514
2090	6.35368
2095	6.1193
2100	5.9101