To create a graph select an item from each of the Group, Figure and Community columns. You can select more items, but be warned - the number of lines rapidly gets out of hand!
Note that the chart creates its own Y-axis scale, based on the largest number to be graphed. Therefore while putting households and emissions on the same graph will work, the households line will appear as a flat line at the bottom of the chart due to the mismatch in scales.
Community anniversaries will occur on January 1st each year, after which the totals will begin to build up for the new year. These are likely to be variable at first, but will settle down as more results are averaged out throughout the year.