Figure 2 - Cumulative number of RefSNP entries in dbSNP and cumulative number of variant loci in the Database of Genomic Variants, plotted as a function of time.
From the following article
The population genetics of structural variation
Donald F Conrad & Matthew E Hurles
3939, S30 - S36 (2007) Published online: 27 June 2007
doi:10.1038/ng2042

Axes have been scaled differently to enhance visualization. RefSNP entries: left axis, blue (M = million). DGV entries: right axis, gray.
