Year	Percent
1950	22.82918
1955	22.57408
1960	20.49406
1965	20.24256
1970	20.987
1975	22.61487
1980	24.81361
1985	24.66455
1990	23.55341
1995	23.29376
2000	24.29529
2005	26.66674
2010	28.41965
2015	29.1358
2020	27.75569
2025	25.9413
2030	25.72319
2035	26.3428
2040	26.411
2045	25.37482
2050	23.86436
2055	22.48628
2060	22.58312
2065	23.9139
2070	24.68168
2075	24.27204
2080	23.52904
2085	22.85517
2090	22.76349
2095	23.22337
2100	23.65817