Dear Department of Internal Affairs,

I would like to know:
- in how many opposite-sex marriages does the husband change his surname to the wife's surname?
- in how many opposite-sex marriages does the wife change her surname to the husband's surname?
- in how many opposite-sex marriages do both parties change their surnames? and of that, how many are hyphenations and how many are novel names (not either of the original surnames)?
- in how many same-sex marriages between women does one woman change her surname to the other woman's surname?
- in how many same-sex marriages between women do both women change their surnames? and of that, how many are hyphenations and how many are novel names (not either of the original surnames)?
- in how many same-sex marriages between men does one man change his surname to the other man's surname?
- in how many same-sex marriages between men do both men change their surnames? and of that, how many are hyphenations and how many are novel names (not either of the original surnames)?

If possible I would like this data over as many years as you have good data for this, to look at trends. But if you only have it for more recent years, that is ok. I'd prefer just the current data to no data.

Yours faithfully,
Emily Harvey