https://www.eea.europa.eu/en/analysis/maps-and-charts/annual-variations-of-the-som35-values-average-values-over-all-stations-which-reported-data-over-at-least-six-years-in-the-period-1996-2002/ozone2004-fig4-3.ai
ozone2004-fig4-3.ai | Annual variations of the SOM35-values. Average values over all stations,...