Year	Percent
1950	9.61529
1955	14.81809
1960	13.70027
1965	11.12084
1970	9.89734
1975	7.59647
1980	7.79869
1985	8.29735
1990	7.85498
1995	7.31571
2000	6.62746
2005	6.08476
2010	4.80017
2015	4.71077
2020	4.93159
2025	4.95267
2030	4.92701
2035	4.7358
2040	4.45809
2045	4.29611
2050	4.33969
2055	4.48827
2060	4.59551
2065	4.59745
2070	4.52613
2075	4.45345
2080	4.45818
2085	4.54681
2090	4.6492
2095	4.69026
2100	4.65845