Happiness as a continuous variable

Ian says "don't think of it as hedonism". He appears to be advocating for having children.

Lifetime happiness (versus?) happiness in the moment.

Eurobarometer surveys, general social surveys - how "robust" are they?

Do original or cover versions of the song "(I Can't Get No) Satisfaction" make you happier personally? Why?

Historical Australian chart:
http://archive.treasury.gov.au/documents/1107/HTML/docshell.asp?URL=02Wellbeing.asp

Is this graph relevant to viewing children as externalities?
https://aifs.gov.au/publications/financial-living-standards-after-divorce/findings

Can you find more recent versions of this graph?
What are the implications of this for policies giving vouchers for marriage counselling?
Who derives economic benefits from taxpayer-funded marriage counselling vouchers?