2011:
2012:
2013:
soep-is-2013-f/Q258 soep-is-2013-a/Q258
2014:
soep-is-2014-a/Q248 soep-is-2014-f/Q248
2015:
2016:
2017:
2019:
2020:
soep-is-2020/Q370 soep-bip-2020-e/Q219
2022:
2023:
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b8cd571b-4075-5440-a3fb-4ea81b734806
DE
2018: