If you wanted to see the progress over the year(s) you had to compare different reports and crunch all those numbers. That's why I put those data to Google Docs spreadsheet and generated following charts.
The sources of the charts data are available at Metrics page at Meego wiki.
Data spreadsheet is available at Google docs.
If you see any problem with the data or charts, let me know. If you want to see some more charts, let me know too.