(a) the pricing of public domain and licensed works

1921 1.100813 0.908420 -2.7367% 1929 1.738120 0.575334 2.8137% 1921 0.112699 8.873159 -7.1889% 1920 0.121429 8.235278 -13.0687% 1919 0.139684 7.159016 15.7925% 1918 0.423394 2.361866 14.2845% 1917 0.380002 2.631566 16.6637% 1916 0.351855 2.842083 20.0069% 1915 0.293195 3.410696 9.1939% 1914 0.346610 2.885091 2.3510% 1913 1.164408 0.858805 YEAR: 1888 2010 38.281251 0.026122 4% Est. 2005 9.254727 0.108053 4% Est. 1992 9.641747 0.103716 4% Est. 1998 1.478457 0.676381 4% Est. 2006 0.854804 1.169859 3.8744% 1988 1.065909 0.938167 3.3218% 1987 4.974533 0.201024 3.1640% 1986 13.080758 0.076448 2.6144% 1985 0.752367 1.329139 2.9715% 1984 13.808342 0.072420 3.6576% 1983 3.819852 0.261790 3.8998% 1982 2.020211 0.494998 6.3831% 1981 3.745065 0.267018 9.6843% 1980 5.870053 0.170356 9.0330% 1979 5.535222 0.180661 8.8650% 1978 4.945335 0.202211 7.2813% 1977 0.534125 1.872221 6.6559% 1976 0.500793 1.996834 6.4072% 1975 0.470638 2.124775 9.8159% 1974 2.084900 0.479639 9.0909% 1973 2.097425 0.476775 6.4509% 1972 6.199691 0.161298 4.7304% 1971 0.167255 5.978912 5.7132% 1970 0.216529 4.618325 5.5272% 1969 3.461021 0.288932

isotropic