Obama's not black, he's bi-racial. So already those people weren't sticking to the pure facts. If they're basing on his genetics the billboard certainly could go into a predominately white neighborhood.
I read your chart and agree with the ratio. However, going strictly by the numbers, most abortions are by white women.
Then the issue must be a little deeper than the billboard, right?
Just a backup link for you from the CDC
http://www.cdc.gov/mmwr/preview/mmwrhtml/ss6001a1.htm?s_cid=ss6001a1_w
Race
Among women from the 37 areas that reported race for 2007, white women (including Hispanic and non-Hispanic white women) accounted for the largest percentage (55.9%) of abortions; black women accounted for 36.5% and women of other racial groups for 7.6% of abortions (Table 12). Black women had higher abortion rates and ratios than white women and women of other races (Table 12). Among the 27 reporting areas that provided data every year during 1998--2007, the percentage distribution of abortions by race changed little; although abortions among women in the other racial category increased, the percentage remained low (Table 13). Abortion rates decreased during 2006--2007 among women from all racial groups, continuing the long-term decrease during 1998--2007 that had been interrupted by a 1-year increase during 2005--2006. However, because the increase in abortion rates during 2005--2006 had been much greater for white women (4%) than for black women (1%), the abortion rate was 2% higher for white women in 2007 than it had been in 2005 but 1% lower than it had been for black women. Abortion ratios also decreased during 2006--2007 among women from all racial groups, with a larger cumulative decrease during 2005--2007 among black women (7%) compared with white women (2%) (Table 13).
Race/Ethnicity
Among women from the 25 areas that reported cross-classified race/ethnicity data for 2007 (Table 14), non-Hispanic white women accounted for the largest percentage of abortions (37.1%), followed by non-Hispanic black women (34.4%), Hispanic women (22.1%), and non-Hispanic women of other races (6.4%). Non-Hispanic white women had the lowest abortion rates (8.5 abortions per 1,000 women aged 15--44 years) and ratios (144 abortions per 1,000 live births); in contrast, non-Hispanic black women had the highest abortion rates (32.1 abortions per 1,000 women aged 15--44 years) and ratios (480 abortions per 1,000 live births). Hispanic women had intermediate abortion rates and ratios; however, although Hispanic women had abortion rates that were 125% higher than non-Hispanic white women, their abortion ratios were only 34% higher. Because 2007 is the first year for which cross-classified race/ethnicity data have been compiled, trends over time could not be evaluated.
Ethnicity
Among the 33 areas that reported ethnicity for 2007, Hispanic women accounted for 19.8% of all abortions and had an abortion rate of 20.5 abortions per 1,000 Hispanic women; they had an abortion ratio of 193 abortions per 1,000 live births to Hispanic women (Table 15). These results are similar to those for Hispanic women who obtained abortions in the 25 reporting areas that provided cross-classified race/ethnicity data (Table 14). Among the 18 reporting areas that provided ethnicity data every year during 1998--2007, the percentage of abortions accounted for by Hispanic women increased 18% (Table 16). In contrast, during 2006--2007, abortion rates and ratios among Hispanic women decreased, continuing the pattern observed during 1998--2007, when the decrease in abortion rates and ratios was greater for Hispanic women than for non-Hispanic women of white, black, and other racial groups combined (Table 16).