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STATISTICS FOR THE ROUGH SET DATABASE SYSTEM

The data record for a given five-year period
Year of completion1981-19851986-19901991-19951996-20002001-20052006-20102011-20152016-2020
Number of publications19269027924760758311947933181
Number of authors19793435296138104611771717223189
The average publications/author1.941.651.921.962.072.161.931.06
Standard deviation publication/author2.351.722.5833.493.442.650.28
The average authors/publication1.992.232.422.532.853.213.562.48
Standard deviation authors/publication1.061.281.641.371.751.671.91.12
Percentage share of publications with n coauthors
n=038.02%30.14%22.35%19.24%13.52%8.05%5.92%17.28%
n=134.38%34.2%37.43%35.19%29.28%25.35%20.02%28.4%
n=219.79%22.32%23.14%25.02%29.63%30.88%28.12%38.27%
n>27.29%12.32%15.29%18.87%25.79%34.92%45.26%13.58%
Number of authors sharing common publications17385133205894102431750217033177
Their percentage share87.82%91.11%94.08%96.02%97.92%98.79%98.9%93.65%
The average: coauthors/author1.571.431.741.811.972.111.90.99
The average: coauthors/author sharing a common publication 1.79 1.57 1.85 1.88 2.01 2.14 1.92 1.06