Year	Percent
1950	5.70062
1955	5.35332
1960	5.0822
1965	4.40258
1970	3.84887
1975	4.08215
1980	2.62872
1985	2.01345
1990	2.35483
1995	2.5318
2000	2.85201
2005	2.40717
2010	2.40191
2015	2.52158
2020	3.40878
2025	4.97553
2030	7.16155
2035	9.02237
2040	11.14975
2045	14.92379
2050	19.06133
2055	21.95564
2060	23.74206
2065	25.31777
2070	26.55895
2075	27.87093
2080	29.11884
2085	30.2101
2090	31.14374
2095	31.86414
2100	32.47642