NEW YORK (CNNMoney) -- Puerto Rico has filed for bankruptcy.

It's the biggest municipal bankruptcy filing ever in the US. Puerto Rico currently owes its creditors a whopping $73 billion, far higher than Detroit's $18 billion bankruptcy in 2013.

"Given the deficit that we have inherited, it is my responsibility to guarantee the best interests of the Puerto Rican people," Governor Ricardo Rosselló said Wednesday.

Bankruptcy won't be an easy process. A judge still has to approve it. Many prominent Wall Street firms own Puerto Rico's bonds. They don't want the island to enter bankruptcy proceedings because it could mean they get paid back far less than what they are owed.

Puerto Rico's situation is ugly. The island has been in an economic recession for about a decade. Over one in 10 people are unemployed.

The island's financial crisis is so bad that Congress installed a Fiscal Oversight Board to call the shots last year. The board stopped trying to negotiate with creditors this week and filed for bankruptcy.

People are literally fleeing the island to go and live in the mainland US, especially Florida. The island's population has declined by 350,000 in the past 10 years. Even worse, CNNMoney found that a doctor a day has left Puerto Rico, causing a severe shortage of medical help as the island was fighting the Zika crisis.

On the campaign trail, Donald Trump said he would not "bail out" Puerto Rico. He repeated that again in a recent tweet.

Mick Mulvaney, Trump's budget director, said Wednesday that the White House pushed hard to ensure no federal dollars would go toward paying the island's debts in the latest Congressional budget deal.

As businesses and people say goodbye to Puerto Rico, there's even less money to pay back creditors. The island's latest budget plan includes only $800 million a year to pay back creditors. That's a mere 20% of what the island had been paying creditors in the past.

Last year, Congress approved special legislation to try to help Puerto Rico. It created the oversight board and a special Title III process that is similar to the Chapter 9 bankruptcy provision that cities like Detroit have used in the past. Chapter 9 isn't an option for Puerto Rico.

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