Year	Percent
1950	13.75558
1955	13.9944
1960	13.66557
1965	13.64166
1970	14.09755
1975	14.27919
1980	14.31988
1985	14.80486
1990	14.90824
1995	14.99446
2000	14.93952
2005	15.45114
2010	14.79989
2015	13.49983
2020	12.82696
2025	12.14911
2030	11.43134
2035	10.65363
2040	9.9245
2045	9.23224
2050	8.6398
2055	8.09401
2060	7.59031
2065	7.1294
2070	6.72537
2075	6.37173
2080	6.0785
2085	5.82787
2090	5.62376
2095	5.44382
2100	5.29652