Year	Percent
1950	21.88185
1955	22.54506
1960	20.25995
1965	20.99248
1970	21.73781
1975	22.62675
1980	24.76383
1985	23.65385
1990	22.96184
1995	24.01964
2000	25.21368
2005	25.81495
2010	28.07633
2015	28.715
2020	29.69814
2025	30.73762
2030	30.51819
2035	28.96378
2040	27.0762
2045	26.49283
2050	25.14449
2055	24.97861
2060	24.95993
2065	24.86353
2070	24.35449
2075	24.11372
2080	23.99174
2085	23.95128
2090	23.93829
2095	23.85852
2100	23.66043