Total column ozone has been dropping for a long time: https://www.researchgate.net/publication/348839525/figure/fig5/AS:984941286395925@1611839710816/Latitudin

Total column ozone has been dropping for a long time: https://www.researchgate.net/publication/348839525/figure/fig5/AS:984941286395925@1611839710816/Latitudinal-variation-of-total-column-ozone-for-different-years.png https://www.researchgate.net/publication/348839525/figure/fi... That means UV exposure outdoors is worse now than it used to be. Unfortunately, it seems nobody measured UV at ground level before we started destroying the ozone layer, but there are barely any historical accounts of serious sunburn before ~1930. Everyone just talks of heat stroke and dehydration rather than actual burning/peeling of the skin.