Year	Percent
1950	27.96884
1955	27.34591
1960	26.79309
1965	26.4787
1970	26.58829
1975	27.24558
1980	28.40349
1985	29.96121
1990	31.41961
1995	32.63782
2000	32.96724
2005	32.62019
2010	31.8664
2015	30.81177
2020	30.10385
2025	29.51548
2030	29.07166
2035	28.82592
2040	28.35922
2045	27.88331
2050	27.32292
2055	26.63377
2060	26.02058
2065	25.44269
2070	24.8625
2075	24.28374
2080	23.73082
2085	23.21936
2090	22.76083
2095	22.36542
2100	22.02637