Year	Percent
1950	10.3051
1955	10.23863
1960	10.11309
1965	10.09652
1970	10.25444
1975	11.03187
1980	11.94617
1985	11.17485
1990	10.0371
1995	10.06957
2000	10.00713
2005	10.04044
2010	9.36391
2015	8.7448
2020	8.37897
2025	8.09326
2030	7.77926
2035	7.4036
2040	7.02023
2045	6.68399
2050	6.38112
2055	6.12207
2060	5.90031
2065	5.69145
2070	5.51302
2075	5.35875
2080	5.23544
2085	5.13586
2090	5.05288
2095	4.98168
2100	4.92279