Year	Percent
1950	9.35076
1955	11.13617
1960	9.3469
1965	9.67108
1970	10.20803
1975	12.05558
1980	11.53678
1985	10.80496
1990	10.373
1995	8.75908
2000	8.10269
2005	6.37542
2010	7.05995
2015	6.26741
2020	4.92058
2025	4.42355
2030	4.28744
2035	4.34967
2040	4.43198
2045	4.55275
2050	4.44708
2055	4.15184
2060	4.04114
2065	4.15408
2070	4.36823
2075	4.58079
2080	4.69724
2085	4.64923
2090	4.50237
2095	4.43562
2100	4.49251