Year	Percent
1950	14.46568
1955	14.30702
1960	13.7977
1965	13.38783
1970	12.90446
1975	12.75027
1980	12.78127
1985	13.06112
1990	14.25851
1995	16.18673
2000	18.50198
2005	21.08778
2010	23.31182
2015	24.31318
2020	25.30918
2025	26.1303
2030	26.62164
2035	27.47072
2040	27.56136
2045	27.26029
2050	26.70474
2055	25.94601
2060	25.34907
2065	24.59314
2070	23.94406
2075	23.42732
2080	23.00793
2085	22.7219
2090	22.51213
2095	22.35149
2100	22.21315