Year	Percent
1950	33.6415
1955	31.47464
1960	32.90356
1965	29.30795
1970	26.67174
1975	27.67431
1980	27.4607
1985	30.05032
1990	28.93452
1995	28.06482
2000	27.29507
2005	27.95577
2010	29.58606
2015	28.47957
2020	25.54431
2025	22.4995
2030	19.85624
2035	20.54406
2040	22.60388
2045	23.73875
2050	23.59625
2055	22.27149
2060	21.51655
2065	21.69795
2070	22.62125
2075	23.50543
2080	23.6584
2085	23.0846
2090	22.36189
2095	22.03188
2100	22.17562