Apple must be doing something right in the PC space – or PC makers are doing something wrong. The ratio of PC sales to Mac sales has dropped to the lowest point in about 15 years, according to a chart created by analyst Horace Dediu.

PC sales numbers peaked against Mac sales in 2004, with more than 50 times as many PCs sold as Macs. Now, that ratio is down to just over 15x. In addition to hitting the lowest level in more than a decade, it's also approximately the same ratio of PC to Mac sales as in 1985.

These numbers are likely global, as the Mac market share in the U.S. alone hovers at around 25 percent.

Industry-leading products like the MacBook Air, which was introduced in 2008, and the MacBook Pro with Retina Display have instilled new life in the notebook space – and left PC makers scrambling to catch up. The rise and consumerization of video and photo editing, industries that are typically Mac-centric, also likely contributes to the narrowed ratio.

Image: Horace Dediu, Asymco

via Business Insider