1 1960 1970 1980 1990 2000 2010 0 2000 4000 6000 8000 10000 Price−Anderson 2 3 4 5 6 1920193019401950196019701980199020002010 0 10 20 30 40 50 60 9.11 7 310 25.9 24.7 6.27 20.5 6.27 16.7 6.7 2.1 0.4 5400 8 1960 1970 1980 1990 2000 2010 1980 1990 2000 2010 2020 2030 2040 2050 2060 1940 1950 1960 1970 1980 1990 2000 0 50 100 150 200 250 300 350 9 10 1970 1980 1990 2000 0 50 100 150 200 250 TMI 11 12