Spacegroup Frequencies of PDB holdings

The original tabulation by Gerard Kleijwegt based on the PDB holdings as of May 1994 is available here.
A more recent tabulation based on the PDB holdings as of Feb 2000 was prepared by Ralf W. Grosse Kunstleve <rwgk@laplace.csb.yale.edu> The table here has been reformatted from pauli.csb.yale.edu/usr-cgi-bin/pdb-sg-freq
Spacegroup
IT# and Symbol		# Obs% Obs% Cum
19 P 21 21 21 2264 23.88 23.88
4 P 21 1231 12.98 36.86
5 C 2 853 9.00 45.86
154 P 32 2 1 607 6.40 52.26
18 P 21 21 2 578 6.10 58.36
96 P 43 21 2 468 4.94 63.30
20 C 2 2 21 442 4.66 67.96
152 P 31 2 1 373 3.93 71.89
92 P 41 21 2 275 2.90 74.79
1 P 1 245 2.58 77.38
23 I 2 2 2 207 2.18 79.56
178 P 61 2 2 193 2.04 81.59
146 R 3 139 1.47 83.06
155 R 3 2 127 1.34 84.40
169 P 61 117 1.23 85.63
94 P 42 21 2 88 0.93 86.56
168 P 6 88 0.93 87.49
198 P 21 3 88 0.93 88.42
76 P 41 74 0.78 89.20
179 P 65 2 2 73 0.77 89.97
98 I 41 2 2 68 0.72 90.69
78 P 43 66 0.70 91.38
150 P 3 2 1 60 0.63 92.02
173 P 63 58 0.61 92.63
182 P 63 2 2 57 0.60 93.23
170 P 65 55 0.58 93.81
97 I 4 2 2 52 0.55 94.36
199 I 21 3 45 0.47 94.83
145 P 32 44 0.46 95.30
181 P 64 2 2 36 0.38 95.68
79 I 4 34 0.36 96.03
90 P 4 21 2 30 0.32 96.35
180 P 62 2 2 27 0.28 96.64
144 P 31 26 0.27 96.91
95 P 43 2 2 25 0.26 97.17
209 F 4 3 2 25 0.26 97.44
197 I 2 3 24 0.25 97.69
211 I 4 3 2 24 0.25 97.94
80 I 41 16 0.17 98.11
143 P 3 15 0.16 98.27
91 P 41 2 2 14 0.15 98.42
21 C 2 2 2 11 0.12 98.53
172 P 64 11 0.12 98.65
210 F 41 3 2 11 0.12 98.77
3 P 2 10 0.11 98.87
22 F 2 2 2 10 0.11 98.98
153 P 32 1 2 10 0.11 99.08
214 I 41 3 2 10 0.11 99.19
75 P 4 9 0.09 99.28
213 P 41 3 2 9 0.09 99.38
77 P 42 8 0.08 99.46
24 I 21 21 21 6 0.06 99.53
151 P 31 1 2 6 0.06 99.59
171 P 62 6 0.06 99.65
177 P 6 2 2 6 0.06 99.72
89 P 4 2 2 5 0.05 99.77
17 P 2 2 21 4 0.04 99.81
93 P 42 2 2 3 0.03 99.84
196 F 2 3 3 0.03 99.87
208 P 42 3 2 3 0.03 99.91
212 P 43 3 2 3 0.03 99.94
195 P 2 3 2 0.02 99.96
207 P 4 3 2 2 0.02 99.98
16 P 2 2 2 1 0.01 99.99
149 P 3 1 2 1 0.01 100.00

Source of data: Indexed lists of PDB released entries -> crystal.idx

Caveat: The PDB contains a large number of entries for very similar structures (i.e. mutant structures), but no attempt was made to take this into consideration when generating the table here. Please keep this in mind when using the data. 

CRYSTAL SPACE GROUPS OF PDB HOLDINGS -   1 FEB 2000

       2  entries have centric space groups
       8  entries have no space group label
    2119  entries have a dummy P1 space group label
    9481  entries considered in the tables below

  0 of the 65 chiral space groups are not in the list