Republicans on Capitol Hill and the campaign trail are vowing to fully "defund" Planned Parenthood after undercover videos surfaced claiming to show staffers trying to sell fetal tissue.

But the push overlooks one thing: Some states have already moved to defund Planned Parenthood, even though it's gone largely unnoticed.

Often, the proposals aren’t the same kind of blunt funding cuts discussed in Washington — that is likely illegal, although at leave five states states are still trying — but lawmakers have found other ways to squeeze funding from the group, either by restricting grants or making it harder for patients to receive services at Planned Parenthood clinics within their borders. Some of the changes have led to dozens of clinics closing in certain states.

And now, the recent videos have spawned a new round of such efforts: Alabama, Arkansas, Louisiana, New Hampshire and Utah are among those moving to cut off state funding.

Data from Planned Parenthood sheds some light on the effect states’ actions have had on the group: Over the last five years, the share of total revenue coming from government sources has fallen by six percentage points, according to Planned Parenthood’s annual reports.

In its 2009-2010 report, 46.5 percent of Planed Parenthood’s total revenue came from the government. By 2013-2014 (its most recent annual report) that share had fallen to 40.5 percent.

It mostly fell each year as well, save for a small bump in 2011-2012.

The trend is the result of less government funding overall going toward the group, not simply the fact that its overall revenues have grown, an increase some attribute to a spike in private donations as the group has come under fire. In 2011-2012, Planned Parenthood reported its highest level of funding from government sources over the last five years, $542.4 million, which comprised 45.2 percent of its roughly $1.2 billion in revenue.

Yet by 2013-2014, government funding had decreased to $528.4 million even as total revenues increased to $1.3 billion.

Some of the fluctuation in government funding can be explained by the natural ebb and flow of patients and the services they receive: Much of the government funds going to Planned Parenthood come through public health insurance programs like Medicaid, the state and federal program that provides health care for the poor, and other grants.

The funding comes as reimbursement for specific services or procedures performed. It’s possible that years in which the organization saw higher levels of government funding are the result of more patients seeking more expensive treatment compared to other years.

But even if that is the case, some state efforts to direct funds away from Planned Parenthood clinics are likely at least contributing to the fact that the organization has also seen total services provided — from STD and cancer screening to family planning services — fall since 2009. In 2013, 647,981 fewer total services were provided by Planned Parenthood nationwide than in 2009, according to data from the annual reports.

Texas

Texas is one place where state policy limited care. The state barred Planned Parenthood from participating in a state health program, which resulted in tens of thousands of women either not receiving care or going elsewhere for treatment. A study on the fallout from the move found one in four publicly funded family planning clinics in Texas closed from 2011 to 2013, and those that remained served half as many patients.

The study, published by the Texas Policy Evaluation Project, noted that while the changed affected many clinics, Planned Parenthood in Texas was especially affected.

New Jersey

Shortly after taking office in 2010, Republican Gov. Chris Christie vetoed $7.5 million in state family planning grants. The state’s Planned Parenthood affiliate says family planning providers saw 30,000 fewer patients in 2012 than they had in 2009, the last year before the funding was cut. (The Christie administration, for its part, has said New Jersey has plenty of other options for women’s health care, something advocates have rejected.)

Planned Parenthood is hesitant to attribute the change in service and funding directly to the policy changes, though, attributing some of the movement to natural fluctuations. The rollout of Obamacare, too, has shifted the health care landscape in the country, offering insurance to millions who didn't have it before. And the total number of services provided includes procedures such as abortion, which taxpayer dollars are not used for, so the state policy changes don't affect all the various services Planned Parenthood offers.

But Elizabeth Nash, a state policy expert at the abortion rights-supporting Guttmacher Institute, says that regardless of whether the policies are directly connected to the funding and service changes, it’s clear states are seeing the desired effect: Limiting funds to Planned Parenthood and similar providers, leading to fewer patients, fewer services and, ultimately, fewer clinics.

“We are seeing attacks on Planned Parenthood that are designed to close clinics,” Nash said, adding that some states are now also trying to limit the types of cancer screening family clinics can provide, going beyond traditional “family planning” restrictions. “This is just a large scale attack, and how that is playing out is going to depend on the state.”