I need to analyse some email response data.

I need to analyse some email response data. I have sent a weekly email to around 1200 clients for the last 6 months.

I need to establish

1. The per centage of the list that has opened at least once.
2. The per centage that has opened it 3 or more times.
3. The per centage that opened it 6 or more times.
4. The per centage that hasn’t opened it at all

I have a CSV file with all of the data. That's around 1,200 records x 26 weeks.

I need the result by Tuesday 26 January 2016.