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

r<=29 213 211.4 0.012 0.012
r=30 5071 5134.0 0.773 0.785
r=31 23100 23103.0 0.000 0.786
r=32 11616 11551.5 0.360 1.145

chi-square = 1.145 with df = 3; p-value = 0.766