Year	Percent
1950	27.91119
1955	27.73483
1960	27.48623
1965	27.095
1970	26.64671
1975	26.14236
1980	25.75038
1985	25.73966
1990	26.07401
1995	26.39224
2000	28.44051
2005	29.42835
2010	29.82868
2015	29.61064
2020	29.35014
2025	29.6701
2030	30.31426
2035	30.96613
2040	31.33191
2045	31.24684
2050	30.9985
2055	30.85155
2060	30.79757
2065	30.71047
2070	30.49021
2075	30.18605
2080	29.84265
2085	29.52054
2090	29.21858
2095	28.88476
2100	28.52027