Add new clients into the monthly breakdown

[raskchanky]

When viewing the monthly breakdown in the output, if you looked under new_clients:

• if you were viewing the current month only, you would see a namespace breakdown
• if you were viewing historical data only, you would see a namespace breakdown
• if you were viewing a date range that spanned both historical data as well as the current month, you'd see nothing

This PR rectifies this by showing the namespace breakdown for new clients in all 3 date range permutations, instead of only the first 2.