Year	Percent
1950	29.32561
1955	28.79912
1960	27.89302
1965	26.96049
1970	26.14021
1975	25.75319
1980	26.2769
1985	26.94467
1990	27.42284
1995	27.89824
2000	28.76337
2005	29.37161
2010	29.7431
2015	29.98488
2020	29.99987
2025	29.99719
2030	30.1324
2035	30.51597
2040	30.82937
2045	31.00449
2050	30.97816
2055	30.75786
2060	30.55643
2065	30.38857
2070	30.22727
2075	30.03173
2080	29.78484
2085	29.50583
2090	29.22808
2095	28.95884
2100	28.70094