Just a nitpick: if something climbs by 60% and then falls by 60%, it hasn't returned to the original level, but to 1.6 * 0.4 = 64% of the original. (Rates rose

Just a nitpick: if something climbs by 60% and then falls by 60%, it hasn't returned to the original level, but to 1.6 * 0.4 = 64% of the original. (Rates rose more than 60% in 2021, as your chart shows. As well as showing how much information is lost when just considering the annual change!)