“Which do you think are the five most important problems in Switzerland?” 1988-2011 
Definitions/comments
Question wording: “On these cards you see some issues that have been intensely discussed and written about lately. Please look at all the cards and select those showing what you consider to be the five most important problems in Switzerland.”
Percentages correspond to the proportion of respondents who selected the issue. Due to a change in concept, data before and after 1995 are only partially comparable.
Sample size: around 1000 respondents per year.
Source: Credit Suisse Swiss Worry Barometer; 1989 – 1994 Isopublic, as from 1995 gfs.bern
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