On Friday, thousands of people will march to the U.S. Supreme Court to defend the right to life for the unborn and stand up for those who do not have a voice.

Check out the shocking facts in this video.

Every year on the anniversary of Roe v. Wade — the sweeping and highly controversial Supreme Court ruling in 1973 that allowed legal abortions in this country — pro-life advocates stream into Washington, D.C., to protest the decision and stand up for their beliefs.

But even many of those who march for life and who participate in the events in the nation's capital don't know the real numbers when it comes to actual abortions performed in this country.

For 43 years, abortion has been legal. Does the public understand the true toll?

How many American lives have been snuffed out before they ever got a chance to live as God intended them?

The number of abortions since 1973 is estimated to be a staggering 57 million — or roughly equivalent to 18 percent of the current United States population.

That's right: 57 million. It's not a typo.

The horrific terrorist attacks of Sept. 11, 2001, killed nearly 3,000 Americans, injured thousands more, and is one of the deadliest days in American history. Yet abortion kills an average of 4,000 American babiesevery single day.

The March for Life each year calls much-needed attention to the right to life. The events, talks, meetings and discussions held each year are deeply felt and highly impactful. But on an average day, in an average week, as most Americans go about their daily lives and usual business, horrendous killings are occurring right under their noses.

Abortion stops a beating heart. It's stopped 57 million so far.

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