It took Apple nine years to sell the billionth iPhone, a milestone the company reached in 2016. This implies that Apple sold 2 billion between 2016 and now — also a nine-year period — marking the product’s growing popularity.

While Apple celebrates 3 billion iPhones sold, the company has struggled a bit in the stock market this year, as the tech giant fell behind Nvidia and Microsoft as the market’s most highly valued businesses. So perhaps a bigger cause for celebration at Apple is that its iPhone sales were stronger this quarter than expected.

Sales of the iPhone, Apple’s most popular product, are up 13% year-over-year, generating $44.6 billion in revenue, according to information shared on the earnings call. That’s nearly half of the entire company’s total revenue this quarter, which reached $94 billion.

This uptick in iPhone sales might be temporary, though. Apple expert and Bloomberg managing editor Mark Gurman mused that the company may have sold more iPhones last quarter over fears that President Trump’s tariff plans would exponentially increase prices in the United States.