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FIGURE 1—— Trends in very-low-birthweight (VLBW) rates and percentage distributions associated with changes in the age–parity distribution and changes in age- and parity-specific rates among Whites and Hispanics (a) and Blacks (b): United States, 1980–2000.

Note. For 1990 through 2000, the odd-year percentage distribution bars associated with changes in the age–parity distribution and changes in age- and parity-specific rates refer to Hispanics, and the even-year bars refer to non-Hispanic Whites.