Year	Percent
1950	14.67875
1955	15.66898
1960	12.62214
1965	13.40486
1970	14.59487
1975	15.06566
1980	14.71845
1985	15.4263
1990	13.98679
1995	15.18217
2000	13.3491
2005	12.52162
2010	11.61837
2015	10.37321
2020	9.81131
2025	9.26332
2030	8.7589
2035	8.22635
2040	7.66808
2045	7.15828
2050	6.75551
2055	6.46265
2060	6.24277
2065	6.05961
2070	5.88144
2075	5.7284
2080	5.59266
2085	5.50459
2090	5.43938
2095	5.389
2100	5.34037