Year	Percent
1950	14.18369
1955	12.74451
1960	15.31146
1965	15.46001
1970	15.79305
1975	15.70988
1980	16.05615
1985	16.04651
1990	15.75589
1995	14.94438
2000	14.15281
2005	13.61881
2010	13.41507
2015	13.77214
2020	13.93373
2025	12.71907
2030	11.67093
2035	10.94013
2040	10.45468
2045	9.97453
2050	9.43651
2055	8.86026
2060	8.28233
2065	7.79537
2070	7.38604
2075	7.05049
2080	6.74538
2085	6.44889
2090	6.19253
2095	5.9701
2100	5.79831