joseph_lee - 8:07 am on Jul 14, 2009 (gmt 0)

My site had a pagerank of 5 last year, it then dropped from 5 to 4 at end of last year, then dropped from to current 2 at beginning of this year. During this period, we even have more quality back links (some articles published in the site related to our business and links from companies who provide similar services with us). Although our pagerank dropped, our site is still in top 3 position of Google search results for the keywords. Can anyone know why our pagerank dropped and kept as low as 2? are there any ways to improve it?