This indicator is obtained directly from the question:

"On a scale of 0 to 10, where 0 is that it is not worthwhile and 10 is that it is fully worthwhile, to what extent do you think that what you are doing in life is worthwhile in general?"

The evaluation measure is grouped into three levels: From 0 to 4 points (Low), from 5 to 7 points (Medium) and from 8 to 10 points (High).