Year	Percent
1950	27.78225
1955	27.23403
1960	26.70442
1965	26.40538
1970	27.41386
1975	28.65334
1980	30.69452
1985	32.50322
1990	32.58074
1995	32.12106
2000	31.83375
2005	31.7952
2010	32.21
2015	32.8932
2020	32.50171
2025	30.81053
2030	28.9406
2035	27.13689
2040	25.64499
2045	24.69066
2050	23.68291
2055	22.79832
2060	22.02242
2065	21.45516
2070	21.06574
2075	20.81807
2080	20.66024
2085	20.53896
2090	20.43505
2095	20.35003
2100	20.29982