In 2000 the National Center for Health Statistics released the second installment of Vital Statistics of the United States, 1997, Volume I, Natality, adding twelve tables of data on births and fertility in the US to the twelve released in April. (There are 39 tables total with the remaining 15 to be released later this year.) The tables break down data on births, birth rates, and fertility rates by race, age, state and region, residency status, martial status, place of delivery, prenatal care, and other indicators. Many of the tables include data from previous years for the sake of comparison, reaching back in some cases to 1909. The Technical Appendix offers detailed descriptions of the data included, and all tables are posted individually in .pdf format.