SAN RAMON, Calif. (AP) — Netflix’s video streaming service has surpassed 200 million subscribers for the first time as its expanding line-up of TV series and movies continues to captivate people stuck at home during the ongoing battle against the pandemic.

The subscriber milestone highlighted Netflix’s fourth-quarter results released Tuesday. The service added another 8.5 million subscribers during the October-December period, capping Netflix’s biggest year since its inception as a DVD-by-mail service in 1997. Netflix ended the year with nearly 204 million worldwide subscribers.

The fourth-quarter gains easily topped the projections of the roughly 6 million additional subscribers projected by Netflix’s own management and Wall Street analysts. Netflix’s stock surged by more than 13% extended trading after the latest subscriber numbers came out.

After its upending of the DVD-rental industry, Netflix introduced the then-revolutionary concept of streaming TV shows and films 14 years ago. At that time, its service had a mere 6 million subscribers.

The streaming service began to grow rapidly seven years ago when Netflix started producing its own shows and accelerated a worldwide expansion that now spans more than 190 countries. Since the February 2013 debut of its first original series, “House of Cards,” Netflix has attracted more than 170 million additional subscribers.

Netflix gained another 37 million subscribers last year, a 22% increase from 2019. Its stock fared even better, rising by 67% last year. The Los Gatos, California, company now boasts a market value of more than $220 billion.

For all its success, Netflix still faces challenges in the coming years from a bevy of deep-pocketed rivals, with perhaps the most formidable posed by a more experienced and even larger entertainment company: Walt Disney Co.

After deciding to stop licensing its library to Netflix, Disney introduced its own video streaming service 14 months ago. The service, Disney Plus, has proved far more popular than anyone imagined, accumulating nearly 90 million subscribers in its first year, emboldening the company’s management to predict that it will boast as many as 260 million subscribers at some point in 2024.

“Our strategy is simple: if we can continue to improve Netflix every day to better delight our members, we can be their first choice for streaming entertainment,” the company wrote Tuesday in its quarterly update to shareholders. “This past year is a testament to this approach.”

To retain and attract subscribers, Netflix has been spending so much money on original programming that the company usually ends up shoveling out more cash than its video services brings in from its subscribers, although it has remained profitable under the accounting standards allowed in the entertainment industry.

The company earned $542.2 million on revenue of $6.64 billion in the fourth quarter, a relatively thin profit margin.

But Netflix finally stopped burning through cash last year, largely because government restrictions imposed during the pandemic curtailed the production of programming. Netflix posted a positive cash flow of $1.9 billion during 2020, the first time that has the company hasn’t had a negative cash flow for an entire year since 2011.

In another breakthrough, Netflix predicted it will no longer need to raise additional cash from lenders to help finance its original-programming budget. The company said it doesn’t expect to experience the same drain on its cash as it has for most of the past decade, even as it ramps up production of its original programming again and gears up to release at least one original film per week on its service throughout this year.