Year	Percent
1950	13.01305
1955	12.85559
1960	13.73105
1965	14.41077
1970	14.95079
1975	15.16664
1980	13.85506
1985	13.79745
1990	17.23242
1995	19.16472
2000	21.0575
2005	21.89012
2010	23.24694
2015	25.0995
2020	26.86898
2025	28.47233
2030	29.61335
2035	31.37761
2040	32.84369
2045	34.5108
2050	36.59568
2055	36.92264
2060	35.79727
2065	35.23508
2070	35.9102
2075	36.14744
2080	36.44027
2085	36.62218
2090	36.58831
2095	36.61891
2100	36.93928