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Figure 1
Histogram of X-ray crystal structures annually deposited in the PDB. The first structure determined from a cryo-cooled crystal (<160 K) was deposited in 1991 and such structures now represent almost 90% of deposited X-ray structures. (Unpublished data extracted from the PDB courtesy of Elspeth Garman and Markus Gerstel.)

IUCrJ
Volume 7| Part 2| March 2020| Pages 148-157
ISSN: 2052-2525
https://doi.org/10.1107/S2052252519016993