New York City Large City Urban-Suburban Rural Average Low Grade 3 9.1% 20.0% 7.9% 5.1% 3.3% 1.5% Grade 4 10.3% 19.5% 10.4% 7.4% 4.5% 1.9% Grade 5 13.3% 32.5% 14.6% 10.4% 6.5% 2.8% Grade 6 18.00% 33.30% 19.50% 12.90% 8.70% 3.60% Grade 7 18.80% 36.80% 19.10% 12.60% 7.10% 3.20% Grade 8 24.10% 35.00% 20.10% 12.00% 7.00% 3.20%