Year	Percent
1950	14.66928
1955	14.23643
1960	13.75442
1965	11.57907
1970	13.23947
1975	14.21421
1980	14.10679
1985	16.25983
1990	20.46791
1995	21.49044
2000	22.05226
2005	21.52247
2010	23.45032
2015	30.10511
2020	31.81389
2025	31.15623
2030	31.1838
2035	30.53988
2040	31.9131
2045	33.96738
2050	35.01412
2055	35.15936
2060	33.47055
2065	31.54344
2070	29.65556
2075	28.31001
2080	28.03043
2085	27.95423
2090	27.75221
2095	27.46081
2100	27.14477