Year	Percent
1950	13.53953
1955	11.83011
1960	12.21508
1965	10.36668
1970	9.33347
1975	8.14646
1980	8.58276
1985	7.06158
1990	7.81641
1995	7.34916
2000	6.87964
2005	5.52085
2010	2.97722
2015	3.20003
2020	3.32004
2025	3.27437
2030	3.16149
2035	3.0359
2040	2.8578
2045	2.78137
2050	2.81134
2055	2.85465
2060	2.88628
2065	2.88268
2070	2.86716
2075	2.87345
2080	2.91299
2085	2.98628
2090	3.06388
2095	3.12805
2100	3.17791