from the Washington Post is this 2013 article by Sarah Kliff titled "CHARTS: How Roe v. Wade changed abortion rights". The map from this article was previously mentioned here.
5. Abortion has become increasingly concentrated among low-income, minority women. Over the past four decades, the demographics of abortion have shifted significantly. In 1973, white women accounted for over three-quarters of all abortions. Now, that number hovers just below 60 percent.
In 1973, white women had over 75% of abortions at a time when white women were an even larger segment of the population (87.7% of the population at the 1970 census). Although she says "Now, [article written in 2013] that number hovers just below 60 percent" for some unexplained reason her graph only goes up to 2004. The word "now" has to do a lot of work to cover nearly a decade. In the 2000 census whites were 75.1% and in the 2010 census whites were 72.4%. So the big news is that as national demographics changed so did the demographics of abortion. Quelle Surprise.
An even better comparison would be to breakdown the demographics by women of childbearing age or by pregnancies.
Her assertion about low income women getting a greater share of abortions is backed by a graph. That makes it odd that she would lead with and write more text about this weaker conclusion.