Year	Percent
1950	26.34405
1955	26.25506
1960	22.912
1965	22.76404
1970	22.39893
1975	22.19683
1980	23.71607
1985	22.0996
1990	23.33421
1995	24.52961
2000	25.97802
2005	27.53441
2010	26.93838
2015	26.58267
2020	25.65048
2025	24.77925
2030	23.8735
2035	22.88847
2040	22.75771
2045	22.72811
2050	22.95759
2055	23.24706
2060	23.23731
2065	22.97847
2070	22.64648
2075	22.49723
2080	22.47826
2085	22.46397
2090	22.35093
2095	22.12612
2100	21.88206