Year	Percent
1950	26.23296
1955	26.44377
1960	26.66971
1965	25.60546
1970	24.31991
1975	22.82087
1980	23.44866
1985	23.42087
1990	24.61275
1995	25.81328
2000	27.40158
2005	28.87021
2010	30.21788
2015	30.23791
2020	29.63754
2025	28.31249
2030	26.93301
2035	26.25337
2040	25.62607
2045	25.04252
2050	24.74119
2055	24.32666
2060	24.11055
2065	24.01724
2070	23.89669
2075	23.81213
2080	23.71623
2085	23.56472
2090	23.3654
2095	23.15065
2100	22.95906