RANK OBSERVED EXPECTED (O-E)^2/E SUM

r<=29 199 211.4 0.729 0.729
r=30 5007 5134.0 3.142 3.872
r=31 23148 23103.0 0.087 3.959
r=32 11646 11551.5 0.773 4.732

chi-square = 4.732 with df = 3; p-value = 0.193