Since the project's inception in 2009, there has been a period of nearly a year where data was not collected for various reasons. As of March 2012, data has been collected at regular intervals.
The default data report restricts the date range from between March 1st, 2012 and today. If you would like to see historical data between April 8th, 2009 and May 23rd, 2010, click the link below. Please note that there may be small gaps in data between those dates, depending on which data stations and fields you have included in your report.