Year	Percent
1950	12.27049
1955	16.32511
1960	18.49789
1965	18.78067
1970	16.83218
1975	16.23177
1980	16.05965
1985	15.80347
1990	16.24349
1995	14.63522
2000	11.14471
2005	10.87124
2010	10.85825
2015	12.57019
2020	11.29862
2025	9.8923
2030	8.85027
2035	8.48065
2040	8.51686
2045	8.43717
2050	8.03218
2055	7.45652
2060	7.00596
2065	6.79545
2070	6.73182
2075	6.66815
2080	6.50081
2085	6.25719
2090	6.03702
2095	5.90934
2100	5.86658