Good day / Servus!
Here are the updated figures for Austrian airports. Vienna Airport sees a particularly impressive rise in passenger numbers.
VIENNA, from current 23,352,016 up to
27,037,349 yearly passengers.
Link is from official Vienna airport website (in German). Midway through the document are the official yearly figures for 2018
https://www.viennaairport.com/unternehmen/investor_relations/news/verkehrsergebnisse?news_beitrag_id=1547640734879 For the other Austrian airports, I consulted this link (in German). They are from the official "STATISTIK AUSTRIA" organization.
http://www.statistik.at/web_de/statistiken/energie_umwelt_innovation_mobilitaet/verkehr/luftfahrt/personenverkehr/070712.html To get the total figures, you need to refer to the tables for "Fluggäste" (passengers), and add the columns for "AN" (arrivals) + "AB" (departures) + "Transit". These are the official figures for 2018.
I did the calculations for you, but it's always better if you double check.
INNSBRUCK: 1,119,347 yearly passengers
GRAZ: 1,030,929 yearly passengers
KLAGENFURT: 228,372 yearly passengers
LINZ: 464,586 yearly passengers
SALZBURG: 1,844,468 yearly passengers
Some of the variations are minimal compared to current AM figures, but at least you would have the exact and latest airport figures for Austria.
Mit freundlichen Grüßen.