Washington (CNN) – A new Census Bureau report shows a higher percentage of African-Americans than whites voted in a presidential election for the first time in history last year during the matchup between President Obama and GOP nominee Mitt Romney.
The report, released Wednesday, found that more than 66% of eligible blacks voted in the presidential contest. Only 64.1% of whites turned out to vote.
This marks the first time since 1968 that blacks turned out at a higher rate the whites.
In addition to blacks turning out at a higher rate, the number of Asian and Hispanic voters grew from 2008 to 2012. Hispanics added 1.4 million people and Asians added over 500,000. Between 1996 and 2012, blacks, Asians and Hispanics all saw their percentage of the voting population increase.
"Over the last five presidential elections, the share of voters who were racial or ethnic minorities rose from just over one in six in 1996 to more than one in four in 2012," said Thom File, the report's author.
The highest turnout of blacks, in addition to the growing number of Hispanics and Asians, could also explain Obama's success in defeating Romney.
According to CNN exit polls, 93% of African-Americans, 71% of Hispanics and 73% of Asians supported Obama over Romney.
Some other findings from the Census Bureau analysis:
• While the Latino vote might turned the election toward Obama and caused much post-election soul-searching among Republicans, the Census Bureau data showed that Latino's turnout rate was far below that of blacks and whites – only 48% of the Latino population turned out, which was nearly two percentage points below the 2008 rate. While the Latino population in the country increased by about 1.4 million to 11.2 million from 2008 to last year, the number of Hispanics who were eligible to vote but didn't grew by 2.3 million to 12.1 million.
But because the Latino share of the under-18 population, they should become an important bloc in the future. While Hispanics make up 17% of the nation's overall population, 24% of the country's under-18 population is Latino.
• Youth voter turnout also declined between the two elections: The turnout rate of those 18 to 24 fell to 41.2% last year, down from 48.5% in 2008. At the same time, the turnout rate of those 65 and older increased from 70.3% in 2008 to 71.9% last year.
But like Latinos, so-called Millennial generation – adults born after 1980 who are now between 18 and 33 – continues to grow. While Millennials are currently 25.5% of the electorate, they are expected to make up 36.5% by 2020.
• Besides the record rate that African-Americans voted at, non-whites made up 26.3% of all voters, another all-time high. The share of the non-white population is also expected to rise from 33.9% to 37.8% in 2020 and 54.8% by 2060, according to Census Bureau projections. Republicans should be concerned – Mitt Romney captured only 17% of the growing non-white population.