Year	Percent
1950	9.59903
1955	11.49332
1960	14.05886
1965	13.15463
1970	12.25075
1975	12.06386
1980	11.84249
1985	11.33023
1990	10.91126
1995	11.85567
2000	11.13979
2005	10.08818
2010	9.02336
2015	8.47379
2020	8.1543
2025	7.89783
2030	7.53036
2035	7.07905
2040	6.6369
2045	6.27537
2050	6.03145
2055	5.86299
2060	5.69352
2065	5.48806
2070	5.26907
2075	5.07597
2080	4.94639
2085	4.8669
2090	4.80876
2095	4.74627
2100	4.66925