Radiosai listener stats

B wanted listenership statistics for the Radio Sai Global Harmony streams. We have stats on total number of visitors served and total number of GB served. Dividing GB by no. of visitors, we arrive at GB/visitor which can be translated into no. of hours per visitor since our streams are approx 10 MB per hour. Eg. July to Dec 2009,
Data transferred - 5.63 terabytes.
Distinct hosts served - 157,032.
Average - 5.63 x 1024 x 1024 / 157032 = 37.6 MB per host,
around 3.7 hours per visitor.

Another derived metric - Total data served divided by the time period of the stats gives us average number of simultaneous listeners. We can take 250 MB as data transferred for one listener per day. Once again, in July to Dec 2009,
Data transferred - 5.63 terabytes.
Data is for - 185 days.
Average - 5.63 x 1024 x 1024 / (185 x 250 ) = 128,
around 128 simultaneous listeners on an average.

This figure has been going up steadily over the years: