A recent Pew Research Center poll shows very similar rise lines for never-married blacks and hispanics. Rises among whites and Asians were more moderate.
"The share of never-married adults has gone up for all major racial and ethnic groups in the U.S., but the rate of increase has been most dramatic among blacks. Among black adults ages 25 and older, the share who has never been married has quadrupled over the past half century—from 9% in 1960 to 36% in 2012. For whites, the share has doubled (from 8% to 16%).
"Among Hispanics and Asian Americans, whose numbers have swelled in recent decades due to a large influx of immigrants, the share of adults who have never married also has increased. Among Hispanic adults, the share has doubled since 1980 (12% vs. 26%). And for Asian American adults, the share has gone up from 13% in 1980 to 19% in 2012."
It also calls into question the impact of the church (especially Protestant for blacks and Catholic for Hispanics) on these communities. Their values seem to be coming from surrounding societal circumstances rather than from the church.