Year	Percent
1950	14.88405
1955	14.39453
1960	13.10533
1965	12.41678
1970	12.57861
1975	12.27672
1980	14.52573
1985	15.64299
1990	15.45407
1995	15.76904
2000	17.07382
2005	19.9697
2010	21.95445
2015	23.76611
2020	23.98711
2025	23.51313
2030	23.68743
2035	24.02341
2040	25.0432
2045	25.57686
2050	25.92755
2055	26.0384
2060	26.06589
2065	26.11594
2070	26.06593
2075	25.79195
2080	25.46219
2085	25.14123
2090	24.85177
2095	24.6166
2100	24.41047