# Dissimilarities of Japanese population structure were increasing
# from 1960-1980 (0.132) to 1980-2000 (0.156).
IndexOfDissimilarity(Jpopl$M1980+Jpopl$F1980, Jpopl$M2000+Jpopl$F2000)
IndexOfDissimilarity(Jpopl$M1980+Jpopl$F1980, Jpopl$M1960+Jpopl$F1960)
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