When was the last price hike? Looking at historical inflation and working backwards, you only need to start at around late 2021 to get 16% cumulative inflation. In other words if they didn't raise their prices for 4 years, they'd be at par with inflation.
edit: another commenter mentioned the last price hike was around 4 years ago, so it's indeed in line with inflation: https://news.ycombinator.com/item?id=46192356