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President Barack Obama may be one of the most anti-2nd Amendment presidents the nation has seen—but he’s also unintentionally turned out to be one of the best advocates for gun ownership to set foot in the White House.

If that sounds unbelievable, just look at the statistics.

According to numbers out from the Crime Prevention Research Center, the number of concealed carry permit holders in the U.S. has grown by a remarkable 215 percent since 2007.

Today, more than 14.5 million Americans have obtained the proper permit to carry a concealed firearm for self-defense.

John. R. Lott Jr., president of the Center, explained: “Previously, the increase in permits had been relatively slow, growing from roughly 2.7 million permit holders in 1999 to 4.6 million in 2007. But the number of concealed handgun permits exploded during the Obama presidency. In December 2011, the Government Accountability Office estimated that there were at least 8 million concealed handgun permits. By June 2014, it was 11.1 million. Now, in 2016, the number is up to over 14.5 million. In other words, during the eight years from 1999 to 2007, the number of permits increased by about 240,000 annually. During the next four years, the number of permits surged by 850,000 annually. Then, in 2012 and 2013, the yearly increase accelerated to 1,550,000. Then 1,690,000 last year and 1,730,000 this year.”

The report provided a bit more good news for gun ownership and national safety: Concealed carry permit holders also happen to be the most law-abiding demographic in the country.

Even more law-abiding than police officers, according to the report: “We find that permit holders are convicted of misdemeanors and felonies at less than a sixth the rate for police officers. Among police, firearms violations occur at a rate of 16.5 per 100,000 officers. Among permit holders in Florida and Texas, the rate is only 2.4 per 100,000.10. That is just one-seventh of the rate for police officers.”

The results in Texas and Florida mirror statistics in other states, according to the researchers.

Even when concealed carry permits aren’t required, however, the Center’s research suggests that more guns in the right hands have a positive impact on public safety.

“In 2014, the seven states that allowed concealed carry without a permit had much lower rates of murder and violent crime than did the seven jurisdictions with the lowest percentage of permit holders,” the Crime Prevention Research Center report reads. “Indeed, the murder rate was 31 percent lower in the states not requiring permits. The violent crime rate was 28 percent lower. Compared to the rest of the country, the 25 states with the highest rates of permit-holding experienced markedly lower rates of murder and violent crime.”