FILE PHOTO: The Intel logo is shown at E3, the world's largest video game industry convention in Los Angeles, California, U.S. June 12, 2018. REUTERS/Mike Blake/File Photo

SAN FRANCISCO (Reuters) - Intel Corp has increased the ratio of women and African-Americans in its workforce after three years of a high-profile effort to improve diversity, the U.S. microchip maker said in a report released on Monday.

Intel still lags behind several large U.S. technology companies in terms of women and ahead of many for African Americans and Hispanics, the report showed. Chronic underrepresentation of minorities has been a source of concern for years at tech companies.

Overall, women comprised 26.8 percent of Intel’s U.S. workforce in 2018, up from 24.7 percent in 2015. Women in leadership positions grew to 20.7 percent from 17.7 percent.

The percentage of African Americans at Intel has risen to nearly 5 percent from 3.5 percent in 2015 and Hispanics rose to 9.2 percent from 8.3 percent.

“Although we are among the leaders in African American representation in the tech industry, we are still not satisfied,” Barbara Whye, Intel’s chief diversity and inclusion officer said by email. The company will continue to work with historically black colleges and the Oakland Unified School District in California, she added.

Without providing figures, Intel said it had reached “full representation” two years ahead of its goal based on skilled minorities in the available workforce.

In 2015, Intel established a $300 million fund to be used by 2020 to improve diversity. Whites make up 46.2 percent of the workforce at the company, and Asians 38.9 percent, according to Intel.

Intel’s African American 2018 representation was better than at Facebook Inc, Alphabet Inc, and Microsoft Corp, according to the companies’ latest data.

But its female representation was behind Facebook, Alphabet, Amazon.com Inc, Apple Inc , and only ahead of Microsoft.