Those 30% numbers are still very high, the similar rate in Italy has dropped bellow 10% for 2 weeks now (it's the line-chart on this page [1] bellow "Tamponi giornalieri e contagiati"), with the latest week's figures somewhere between 5% and 7%.
Norway's number of positive tests was 5% at the current peak of the epidemic, for reference. Testing and isolation measures have been very effective here, so we have not had an overwhelming wave of infections (yet, knock on wood).
[1] https://lab24.ilsole24ore.com/coronavirus/