Year	Percent
1950	27.27058
1955	27.07905
1960	26.95919
1965	26.55652
1970	26.48088
1975	27.01042
1980	27.61531
1985	29.09493
1990	30.4683
1995	31.32791
2000	31.97208
2005	32.24597
2010	32.63223
2015	32.61593
2020	31.756
2025	30.86585
2030	29.78643
2035	29.02239
2040	28.48567
2045	27.83825
2050	27.00623
2055	25.9453
2060	24.99279
2065	24.21561
2070	23.58023
2075	23.01666
2080	22.48347
2085	21.97422
2090	21.53075
2095	21.18072
2100	20.91811