Year	Percent
1950	11.84599
1955	11.88715
1960	12.11086
1965	12.27711
1970	12.35419
1975	12.53775
1980	12.79978
1985	13.02977
1990	13.10767
1995	12.66153
2000	12.28563
2005	12.51293
2010	12.76161
2015	12.69671
2020	12.32377
2025	11.78758
2030	11.34651
2035	11.03148
2040	10.79225
2045	10.51908
2050	10.17331
2055	9.79748
2060	9.45349
2065	9.16327
2070	8.91977
2075	8.70294
2080	8.46669
2085	8.21347
2090	7.9642
2095	7.74192
2100	7.54296