Year	Percent
1950	28.81868
1955	30.11666
1960	33.44441
1965	31.56204
1970	28.11331
1975	27.73235
1980	27.17763
1985	29.83127
1990	30.5481
1995	29.90119
2000	28.80862
2005	28.30963
2010	28.69422
2015	28.02552
2020	26.60273
2025	24.76493
2030	23.68247
2035	23.74112
2040	24.51292
2045	25.29613
2050	24.64958
2055	23.20552
2060	22.56572
2065	22.72136
2070	23.1462
2075	23.25576
2080	22.84598
2085	22.1679
2090	21.67003
2095	21.56063
2100	21.68962