How mainy British's pilots were shot down and killed per month in the battle of Britain?

These are the grand totals for the Battle of Britain

544 airmen killed

1,547 aircraft destroyed

If you want to see a daily amount of the deaths and planes destroyed you can see the official RAF site. www raf mod UK I tried to link this to this website but I am not certain it worked. Anyway, I searched around in references and could not find any monthly totals. Only the Royal Air Force had a daily total for the Battle of Britain.