Year	Percent
1950	28.57609
1955	27.57287
1960	31.85661
1965	29.96239
1970	27.72513
1975	29.13039
1980	29.27986
1985	32.4163
1990	32.53574
1995	31.67078
2000	31.36493
2005	32.06637
2010	33.38283
2015	32.68802
2020	30.13556
2025	27.50346
2030	26.16701
2035	27.6171
2040	29.87096
2045	31.16796
2050	29.96372
2055	27.52783
2060	26.42777
2065	26.44723
2070	26.89715
2075	26.96461
2080	26.32405
2085	25.25658
2090	24.28764
2095	23.78146
2100	23.69813