Year	Percent
1950	15.84995
1955	15.90573
1960	16.47895
1965	15.33757
1970	14.40729
1975	12.99538
1980	12.70673
1985	11.98968
1990	10.27124
1995	9.4078
2000	8.74035
2005	8.92812
2010	8.84945
2015	7.9319
2020	7.23412
2025	6.65802
2030	6.34004
2035	6.22747
2040	6.09005
2045	5.79089
2050	5.43231
2055	5.14947
2060	5.00577
2065	4.96459
2070	4.94864
2075	4.85466
2080	4.6988
2085	4.55067
2090	4.47782
2095	4.48308
2100	4.51757