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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 publications196697281147867607120599652721
Number of authors198937354461481048617810174431085
The average publications/author1.951.661.921.962.072.171.962.18
Standard deviation publication/author2.341.782.613.033.513.482.763.89
The average authors/publication1.972.232.422.522.853.213.543.28
Standard deviation authors/publication1.061.281.631.371.741.671.911.73
Percentage share of publications with n coauthors
n=039.29%30.42%22.52%19.41%13.53%8.09%6.09%10.26%
n=133.67%34.15%37.39%35.19%29.32%25.38%20.59%23.58%
n=219.39%22.09%23.05%24.99%29.66%30.88%28.16%29.82%
n>27.14%12.34%15.3%18.78%25.75%34.88%44.51%36.06%
Number of authors sharing common publications173851333559061026817595172531070
Their percentage share87.37%90.82%94.1%96.06%97.92%98.79%98.91%98.62%
The average: coauthors/author1.561.431.741.811.972.121.922.11
The average: coauthors/author sharing a common publication 1.79 1.58 1.85 1.89 2.01 2.14 1.94 2.14