7
gibbon
chimpanzee  1.31246
sumatran    1.37126  0.90859
orangutan   1.40413  0.90861  0.20127
gorilla     1.33943  0.45012  0.94433  0.94744
human       1.31990  0.34807  0.89956  0.92219  0.48236
bonobo      1.27691  0.11351  0.89827  0.89101  0.42874  0.33433