Year	Percent
1950	14.40065
1955	15.95975
1960	16.59956
1965	16.2294
1970	15.54625
1975	16.16675
1980	17.78021
1985	19.22075
1990	22.16641
1995	24.56331
2000	27.00983
2005	30.45151
2010	31.44744
2015	30.91921
2020	28.5502
2025	24.95165
2030	22.75951
2035	23.41845
2040	25.09876
2045	27.15215
2050	28.7002
2055	27.11019
2060	25.48969
2065	24.42985
2070	24.08237
2075	24.78098
2080	25.09503
2085	24.80767
2090	24.0822
2095	23.46409
2100	23.29253