Year	Percent
1950	26.85352
1955	26.60894
1960	25.52285
1965	24.80359
1970	23.39411
1975	23.38355
1980	26.36571
1985	30.65391
1990	32.51829
1995	33.04758
2000	32.73094
2005	31.20341
2010	30.68273
2015	30.1191
2020	30.18326
2025	29.58264
2030	29.00081
2035	28.17477
2040	27.49308
2045	26.99114
2050	26.4928
2055	25.82718
2060	25.14751
2065	24.48734
2070	23.8774
2075	23.3756
2080	22.95624
2085	22.58614
2090	22.25339
2095	21.94284
2100	21.68882