A significant decline has come in the number of poor Americans who are uninsured in 2014 since the time Affordable Care Act has extended coverage to millions of America, finds a new report.

The findings were released on Tuesday and the percentages and numbers are from the National Center for Health Statistics’ National Health Interview Survey. The report is based on the answers of 111,682 people.

The survey has also revealed that percentage of black Americans who were uninsured has dropped from 18.9% in 2013 to 13.5%. Black Americans under the age of 65 made the biggest gains. Hispanics in the same age group were also benefitted largely. The share of whites who were uninsured fell from 12.1% in 2013 to 9.8%.

As per the experts, it is the biggest ever change noticed among any racial or ethnic group since the time the survey has started in 1997.

In total there were 36 million people in America that were uninsured in 2014 and the number is down from 44.8 million people in 2013. The survey asks consumers a number of health topics. When it comes to health insurance, the section has questions like if people are currently uninsured and if they have remained uninsured at any time in the last year among many other questions.

As per Kaiser Family Foundation data, federal healthcare reform asked states to expand Medicaid. But a ruling by the US Supreme Court made the reform option. Twenty one states and the District of Columbia have adopted the expansion; two states have been considering it and 19 states including Virginia have not accepted the expansion.