Year	Percent
1950	12.87654
1955	12.25132
1960	13.05322
1965	12.91009
1970	12.96477
1975	13.28489
1980	13.80587
1985	14.17439
1990	14.67505
1995	14.5041
2000	14.6917
2005	14.76081
2010	15.26424
2015	15.79176
2020	15.34291
2025	14.74421
2030	14.27531
2035	13.84997
2040	13.32742
2045	12.70129
2050	12.01214
2055	11.33248
2060	10.72127
2065	10.14471
2070	9.6257
2075	9.12406
2080	8.6403
2085	8.20446
2090	7.79038
2095	7.4238
2100	7.10163