Provisional Geographic-specific Exclusive Breastfeeding Rates among Children born in 2007 (Percent +/- half 95% Confidence Interval)
State & Breakdown n Exclusive Breastfeeding1
through 3 months		 Exclusive Breastfeeding1
through 6 months
US National 16336 33.0±1.2 13.3±0.9
ALABAMA 246 23.3±5.9 8.8±3.6
ALASKA 192 43.6±7.6 23.1±6.3
ARIZONA 306 34.5±6.3 12.7±4.4
ARKANSAS 296 23.0±6.1 11.8±4.5
CALIFORNIA 488 40.4±5.9 17.2±4.4
  CA-Los Angeles County 247 38.6±6.8 16.2±5.1
COLORADO 333 46.8±8.7 22.5±7.3
CONNECTICUT 228 39.0±8.0 19.5±6.5
DELAWARE 266 31.7±6.2 11.5±4.1
DISTRICT OF COLUMBIA 359 29.1±5.6 11.7±3.4
FLORIDA 383 30.6±5.7 9.9±3.5
GEORGIA 290 25.1±5.9 9.7±3.6
HAWAII 222 42.3±7.4 16.0±5.5
IDAHO 185 41.5±8.0 21.8±7.0
ILLINOIS 637 27.9±4.8 11.2±3.5
  IL-City of Chicago 335 24.9±5.3 7.4±2.8
INDIANA 666 29.2±5.7 10.5±3.7
  IN-Lake County 217 23.4±6.5 6.7±3.6
  IN-Marion County 226 31.1±6.7 11.9±4.6
IOWA 253 35.5±6.5 15.7±4.9
KANSAS 202 37.3±8.0 18.5±6.6
KENTUCKY 305 26.4±5.6 12.0±3.9
LOUISIANA 292 22.0±5.8 7.8±3.8
MAINE 239 45.5±7.0 18.2±5.1
MARYLAND 434 32.4±7.2 10.8±4.2
  MD-Baltimore City 248 24.4±5.9 11.1±4.1
MASSACHUSETTS 246 37.9±7.3 20.5±6.1
MICHIGAN 295 28.7±6.3 10.1±3.9
MINNESOTA 217 49.0±7.6 20.4±5.7
MISSISSIPPI 360 15.2±3.7 6.5±2.6
MISSOURI 292 28.2±5.8 12.4±4.2
MONTANA 227 50.8±7.7 23.0±6.3
NEBRASKA 219 38.8±7.5 12.4±4.8
NEVADA 280 35.1±6.7 12.4±4.1
NEW HAMPSHIRE 221 47.2±7.0 18.8±5.5
NEW JERSEY 340 29.8±5.6 10.0±3.3
NEW MEXICO 289 46.8±7.1 18.7±5.6
NEW YORK 480 32.8±4.8 14.4±3.7
  NY-NYC 5 Counties 253 31.5±6.6 13.3±5.0
NORTH CAROLINA 230 28.2±7.0 8.7±3.7
NORTH DAKOTA 173 40.9±7.7 15.2±5.6
OHIO 265 34.8±6.6 12.8±4.4
OKLAHOMA 283 22.6±5.3 6.7±3.0
OREGON 278 50.5±6.9 23.7±5.7
PENNSYLVANIA 542 34.0±5.6 10.8±3.7
  PA-Philadelphia 292 26.8±5.4 8.6±3.3
RHODE ISLAND 268 29.0±6.6 12.1±4.7
SOUTH CAROLINA 247 23.1±5.6 6.9±3.0
SOUTH DAKOTA 234 43.6±7.2 15.8±5.5
TENNESSEE 339 24.4±5.1 9.2±3.6
TEXAS 1249 27.6±4.5 11.1±2.9
  TX-Bexar County 269 25.9±6.0 11.0±4.5
  TX-City of Houston 239 26.1±6.4 9.8±4.2
  TX-Dallas County 214 37.1±7.9 16.8±6.5
  TX-El Paso County 276 36.7±6.6 16.1±4.9
UTAH 251 41.3±7.5 16.3±5.1
VERMONT 279 45.2±6.4 22.3±5.2
VIRGINIA 269 32.6±7.2 14.2±4.7
WASHINGTON 415 43.8±6.1 21.2±4.9
  WA-Eastern/Western WA 240 44.2±7.0 20.2±5.7
WEST VIRGINIA 219 18.3±5.3 7.0±3.1
WISCONSIN 278 39.3±6.8 16.4±4.8
WYOMING 229 48.5±7.4 16.7±5.5

1Exclusive breastfeeding is defined as ONLY breast milk — NO solids, no water, and no other liquids.
Source: National Immunization Survey, Centers for Disease Control and Prevention, Department of Health and Human Services

Sample sizes appearing in the NIS breastfeeding tables are slightly smaller than the numbers published in other NIS publications due to the fact that in the DNPAO breastfeeding analyses, the sample was limited to records with valid responses to the breastfeeding questions.

Counties and cities not sampled or with sample size <100 (AL-Jefferson County; AZ-Maricopa County; CA-Alameda County; CA-Fresno County; CA-Northern CA ; CA-San Bernardino County; CA-San Diego County; CA-Santa Clara County; CO-Denver; FL-Duval County; FL-Miami-Dade County; FL-Orange County; GA-Fulton/DeKalb Counties; IL-Madison/St. Clair Counties; KS-Eastern KS; LA-Orleans Parish; MA-City of Boston; MI-City of Detroit; MN-Twin Cities; MO-St. Louis County/City; NJ-City of Newark; NM-Southern NM; NV-Clark County; OH-Cuyahoga County; OH-Franklin County; PA-Allegheny County; TN-Davidson County; TN-Shelby County; WA-King County; and WI-Milwaukee County) are not reported on in this table.