Year	Percent
1950	13.76717
1955	12.89576
1960	16.34289
1965	16.82599
1970	16.41255
1975	15.9864
1980	15.64559
1985	15.91737
1990	15.7706
1995	13.87035
2000	12.77948
2005	11.93491
2010	10.9671
2015	10.66597
2020	10.75778
2025	9.98757
2030	9.1736
2035	8.4493
2040	7.92082
2045	7.5552
2050	7.26333
2055	6.96725
2060	6.65945
2065	6.38051
2070	6.15608
2075	6.00074
2080	5.88665
2085	5.78563
2090	5.67321
2095	5.56377
2100	5.47819