Year	Percent
1950	10.81377
1955	11.90192
1960	12.02395
1965	12.50837
1970	12.47322
1975	12.59313
1980	12.80351
1985	12.76296
1990	12.90846
1995	13.1639
2000	13.42692
2005	13.6497
2010	13.59244
2015	13.68948
2020	13.56274
2025	13.23758
2030	12.88365
2035	12.56147
2040	12.21148
2045	11.79908
2050	11.34678
2055	10.89629
2060	10.45817
2065	10.03556
2070	9.61589
2075	9.20005
2080	8.80548
2085	8.43427
2090	8.08371
2095	7.75754
2100	7.44969