Year	Percent
1950	22.05122
1955	22.34222
1960	20.48448
1965	20.7702
1970	21.28593
1975	21.94404
1980	23.00176
1985	21.33072
1990	22.10833
1995	24.14152
2000	26.82307
2005	28.69684
2010	27.92609
2015	26.95948
2020	26.99397
2025	29.15461
2030	30.88076
2035	31.05245
2040	29.0353
2045	25.82849
2050	24.27752
2055	23.42
2060	23.42489
2065	23.66068
2070	22.80483
2075	21.95138
2080	21.62372
2085	21.84402
2090	22.2517
2095	22.53996
2100	22.4641