Year	Percent
1950	26.77953
1955	28.38465
1960	28.07823
1965	25.26279
1970	25.21593
1975	25.63283
1980	26.5453
1985	26.38947
1990	26.10878
1995	30.00643
2000	27.33279
2005	28.10224
2010	30.67029
2015	30.74914
2020	31.11595
2025	31.10547
2030	31.14804
2035	32.32175
2040	32.59039
2045	32.27026
2050	31.54377
2055	30.98594
2060	30.64692
2065	30.33365
2070	29.79407
2075	28.95294
2080	27.96667
2085	27.0384
2090	26.27309
2095	25.60602
2100	24.95189