My visiualization were uploaded as gists:

• First version: http://bl.ocks.org/jimmylai/b3b9d294f6b24421b81270f55657589e
• Final version: http://bl.ocks.org/jimmylai/e36988f7dbbfa54ff64b253b8e5b22de

Note that only one chart is display in the page, please click "open" button to see all charts.