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

r<=29 204 211.4 0.260 0.260
r=30 5176 5134.0 0.343 0.604
r=31 23092 23103.0 0.005 0.609
r=32 11528 11551.5 0.048 0.657

chi-square = 0.657 with df = 3; p-value = 0.883