Apple has reported a drop in revenue for the first time in 16 years as iPhone sales fell for the first time in the product’s history.

The company saw sales drop 13% in the three months to the end of March.

Chief executive Tim Cook partially blamed “strong macroeconomic headwinds” including the strong US dollar for the decline in sales, which was particularly severe in China.

However, the latest figures show that sales of the iPhone, which accounts for two thirds of all of Apple’s revenue, fell for the first time since it was launched nine years ago. Sales of the iPad and Mac computers also declined, which sent quarterly profits down 23%, slightly worse than had been anticipated.

However, the company is due to launch its completely redesigned iPhone 7 and iPhone 7 Plus handsets later this year, which are expected to bolster the company’s sales. In addition, 2017 will see the iPhone’s 10th birthday and it is anticipated that the company will mark the occasion with major innovations in its offering.