Year	Percent
1950	28.39214
1955	28.85461
1960	28.64031
1965	27.80152
1970	26.742
1975	25.22158
1980	24.10178
1985	26.01719
1990	28.06214
1995	30.36694
2000	31.94354
2005	32.78639
2010	33.03207
2015	33.59889
2020	33.73677
2025	33.51234
2030	32.71832
2035	31.57599
2040	30.14637
2045	28.56805
2050	27.22373
2055	25.94995
2060	24.68011
2065	23.55382
2070	22.62738
2075	21.92046
2080	21.40434
2085	21.00744
2090	20.71538
2095	20.51537
2100	20.38975