Year	Percent
1950	10.0334
1955	9.69434
1960	9.5693
1965	9.94248
1970	8.87652
1975	8.56829
1980	7.77406
1985	6.63754
1990	5.37296
1995	5.05551
2000	4.86295
2005	4.91141
2010	4.35904
2015	3.91738
2020	3.49244
2025	3.31957
2030	3.39613
2035	3.5131
2040	3.5727
2045	3.54353
2050	3.46738
2055	3.42559
2060	3.49831
2065	3.65742
2070	3.83058
2075	3.93847
2080	3.97016
2085	3.96183
2090	3.97618
2095	4.04043
2100	4.12774