Year	Percent
1950	15.81177
1955	15.06416
1960	14.53762
1965	14.11812
1970	13.85783
1975	13.43102
1980	12.77781
1985	11.45038
1990	11.06521
1995	11.51459
2000	11.34109
2005	11.1355
2010	11.30574
2015	11.82599
2020	12.82892
2025	14.01511
2030	15.30433
2035	16.83449
2040	18.84063
2045	21.16651
2050	23.53265
2055	25.18805
2060	26.27702
2065	26.83099
2070	27.09958
2075	27.53545
2080	27.8097
2085	27.94964
2090	27.88904
2095	27.666
2100	27.34793