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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 publications19269428004771758611958934082
Number of authors19693535346143104621772117226191
The average publications/author1.951.661.921.962.072.161.931.06
Standard deviation publication/author2.351.782.613.033.513.452.650.28
The average authors/publication1.992.232.422.532.853.213.562.48
Standard deviation authors/publication1.061.281.631.371.751.671.91.11
Percentage share of publications with n coauthors
n=038.02%30.12%22.36%19.24%13.55%8.09%5.95%17.07%
n=134.38%34.29%37.5%35.23%29.3%25.34%20.02%29.27%
n=219.79%22.19%23.11%25.05%29.61%30.88%28.13%37.8%
n>27.29%12.39%15.29%18.84%25.78%34.91%45.22%13.41%
Number of authors sharing common publications17385133255900102431750617034179
Their percentage share88.27%91.02%94.09%96.04%97.91%98.79%98.89%93.72%
The average: coauthors/author1.581.441.741.811.972.111.90.99
The average: coauthors/author sharing a common publication 1.79 1.58 1.85 1.89 2.01 2.14 1.92 1.06