Table 1

Cumulative and average IFs for articles from the five countries

YearCumulative IFAverage IF
USAUKJapanGermanyMCUSAUKJapanGermanyMC
20055865.8961056.8321089.882634.94478.7162.0471.9292.1122.1162.385
20066425.4661045.2661120.177831.133140.8992.0611.8832.1142.1992.168
20076482.4601195.2601103.435848.391222.1862.0941.8532.1382.2152.314
20086262.0571094.8611072.712893.142303.6792.0241.7772.0392.1422.266
20097880.5831135.5161154.643910.234506.1022.4471.7692.0732.0731.763
20106636.5801035.2841123.8441084.724561.4882.1261.6812.0252.1351.707
20118127.6191136.5791178.7691071.755852.7242.3391.6452.0722.1441.814
20127885.9481311.9861279.1971089.660997.2982.0871.6762.5082.1371.885
20137716.0641359.9621308.4231275.9191279.8322.3871.8282.0352.1371.888
20145048.1071708.5001637.3441524.2991555.2802.3051.9802.0572.2782.025
Total68 330.78012 080.04612 068.42610 164.2016498.2042.1911.8022.1112.1621.917
  • IF, impact factor; MC, Mainland China.