Year	Percent
1950	14.13532
1955	14.32625
1960	14.98226
1965	15.02597
1970	15.1851
1975	15.45677
1980	15.41563
1985	15.49216
1990	15.71626
1995	16.06284
2000	16.52885
2005	16.50752
2010	16.5051
2015	16.19806
2020	15.662
2025	15.10194
2030	14.57926
2035	14.02825
2040	13.41922
2045	12.7809
2050	12.16075
2055	11.56784
2060	11.00608
2065	10.46145
2070	9.93201
2075	9.43491
2080	8.97093
2085	8.53737
2090	8.13808
2095	7.76558
2100	7.42107