Figure 2
From: ArrayWiki: an enabling technology for sharing public microarray data repositories and meta-analyses
Comparison of microarray repository contents. The relative size of each pie corresponds to the number of experiments contained in each repository. Key observations include that SMD does not contain much recent data. One data artifact is found in the caArray Yearly Breakdown. An abnormal number of experiments show a date of '1-1-2000' because that is the default value in the data entry form and validation of the data is inadequate.