Year	Percent
1950	14.6601
1955	14.64371
1960	16.51738
1965	15.89943
1970	15.47163
1975	14.8791
1980	14.34786
1985	14.04804
1990	13.71153
1995	13.56938
2000	12.9837
2005	12.56684
2010	11.48324
2015	10.87032
2020	10.56746
2025	10.19691
2030	9.7761
2035	9.36193
2040	8.97444
2045	8.59837
2050	8.25479
2055	7.93641
2060	7.62074
2065	7.30411
2070	7.02364
2075	6.77218
2080	6.55267
2085	6.35322
2090	6.16896
2095	6.00107
2100	5.84763