Year	Percent
1950	11.81111
1955	11.73412
1960	13.60921
1965	13.5598
1970	13.47898
1975	13.548
1980	14.29811
1985	14.77873
1990	15.07825
1995	15.35786
2000	15.71593
2005	15.90169
2010	15.85152
2015	15.56521
2020	15.1725
2025	14.69267
2030	14.15329
2035	13.58051
2040	12.96004
2045	12.33631
2050	11.71971
2055	11.13063
2060	10.58107
2065	10.08077
2070	9.61726
2075	9.1795
2080	8.75867
2085	8.37694
2090	8.01501
2095	7.67299
2100	7.36669