Year	Percent
1950	15.99346
1955	15.23287
1960	14.77158
1965	15.05074
1970	15.07718
1975	14.99306
1980	14.14549
1985	12.3964
1990	11.84414
1995	12.72992
2000	14.43807
2005	17.25602
2010	19.6587
2015	21.35405
2020	24.09846
2025	28.28253
2030	31.87585
2035	33.00842
2040	31.36629
2045	27.80521
2050	25.18807
2055	25.1497
2060	26.21059
2065	26.52775
2070	25.19431
2075	23.08489
2080	21.86353
2085	22.0246
2090	22.89381
2095	23.43714
2100	23.15219