Despite being out for over 15 years, Minecraft still has a steady rate of sales, maintaining it's position as the top selling game for over 5 years. Though it is going strong, it has seen some sharp declines over the years.
From around 2016 to 2018, Minecraft's rate of sales had started to plateau. Dropping from around 40% increase in total sales to around 7% increase, this was the biggest decline in Minecraft's history.
Though in recent years, that rate has started to increase again. It has increased back to around 20%, and will potentially continue to grow given the current state of Minecraft.