Year	Percent
1950	27.61603
1955	26.84602
1960	25.9438
1965	25.12291
1970	24.43148
1975	24.86337
1980	26.12599
1985	27.57909
1990	29.48463
1995	31.79381
2000	32.92879
2005	33.19898
2010	33.37387
2015	32.56361
2020	32.08539
2025	31.51423
2030	30.55001
2035	29.52271
2040	28.30966
2045	27.16779
2050	26.1001
2055	24.88764
2060	23.78098
2065	22.87308
2070	22.18102
2075	21.65521
2080	21.22033
2085	20.85605
2090	20.55985
2095	20.33525
2100	20.19708