Year	Percent
1950	27.58793
1955	25.26184
1960	25.64495
1965	24.64284
1970	24.63109
1975	25.54443
1980	26.66885
1985	27.70431
1990	29.43916
1995	30.6339
2000	28.98057
2005	27.16265
2010	25.38634
2015	25.33052
2020	24.66127
2025	23.04622
2030	21.43001
2035	20.13373
2040	20.01308
2045	20.30954
2050	20.65256
2055	20.73145
2060	20.46234
2065	20.14932
2070	20.04302
2075	20.21753
2080	20.50131
2085	20.66127
2090	20.57153
2095	20.30026
2100	20.022