This indicator is obtained directly from the question:

"On a scale of 0 to 10, where 0 is Zero satisfaction and 10 is Very high satisfaction, what is your general level of satisfaction with your life at present?"

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