Year	Percent
1950	6.11926
1955	6.04435
1960	6.03614
1965	5.88154
1970	6.09382
1975	5.92108
1980	6.05422
1985	6.45411
1990	7.67917
1995	8.19201
2000	9.17285
2005	10.62213
2010	13.3218
2015	14.37083
2020	16.04104
2025	18.13852
2030	20.42179
2035	22.76762
2040	23.92258
2045	24.61612
2050	25.75444
2055	27.36119
2060	28.60147
2065	29.58999
2070	30.45133
2075	31.55172
2080	32.60334
2085	33.53567
2090	34.35677
2095	35.08093
2100	35.73207