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

r<=29 218 211.4 0.205 0.205
r=30 5130 5134.0 0.003 0.208
r=31 23158 23103.0 0.131 0.339
r=32 11494 11551.5 0.286 0.625

chi-square = 0.625 with df = 3; p-value = 0.891