Year	Percent
1950	6.04302
1955	12.73505
1960	13.53362
1965	13.71874
1970	13.09288
1975	9.15181
1980	8.33176
1985	7.77202
1990	6.8775
1995	6.00253
2000	5.71608
2005	4.54299
2010	3.27549
2015	3.40287
2020	3.57653
2025	4.2079
2030	4.36288
2035	4.26685
2040	3.73013
2045	3.43804
2050	3.53511
2055	3.8727
2060	4.22648
2065	4.43134
2070	4.41224
2075	4.27403
2080	4.2211
2085	4.33868
2090	4.54617
2095	4.7021
2100	4.72057