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統 計 集表 8-1-6 各 国 における 国 際 共 著 の 推 移(A) 全 論 文 における 国 際 共 著 の 割 合年1981198219831984198519861987198819891990199119921993199419951996199719981999200020012002200320042005全 体5.35.65.96.56.77.27.88.28.89.410.411.612.313.113.914.815.816.517.417.918.819.419.920.320.6米 国7.07.58.18.69.29.710.511.011.612.313.614.815.716.917.819.020.321.522.723.724.925.826.627.127.9日 本5.05.66.06.77.07.38.08.49.19.810.711.512.613.614.514.416.316.517.618.519.520.221.322.422.8ドイツ----------26.228.029.630.732.134.335.636.438.639.742.144.045.446.547.0イギリス13.113.413.714.915.015.917.018.019.120.322.024.324.926.128.230.032.233.335.136.238.740.841.843.945.4フランス15.116.417.519.020.020.821.923.325.426.028.530.831.332.333.735.537.338.139.642.043.344.746.248.449.5イタリア16.616.918.019.720.122.324.523.825.127.028.330.031.432.333.433.635.737.138.438.239.439.439.740.442.2カナダ16.517.216.718.118.519.019.820.721.823.724.826.528.129.130.231.534.535.336.137.339.940.741.643.143.6中 国10.512.918.623.622.522.420.822.423.223.027.326.826.327.127.329.228.128.027.525.626.426.226.125.224.5( 単 位 :%)ロシア-----------15.318.020.423.426.229.031.233.932.937.838.940.140.342.0(B) 国 際 共 著 数( 単 位 : 件 数 )年 全 体 米 国 日 本 ドイツ イギリス フランス イタリア カナダ 中 国 ロシア1981 20,465 9,947 1,293 - 4,389 3,063 1,428 2,685 146 -1982 22,575 11,104 1,542 - 4,642 3,365 1,600 2,941 300 -1983 24,753 12,290 1,699 - 4,962 3,650 1,926 3,045 475 -1984 24,040 12,168 1,780 - 4,859 3,522 1,923 3,083 531 -1985 29,634 14,788 2,289 - 5,727 4,447 2,297 3,740 672 -1986 31,492 15,630 2,415 - 6,015 4,751 2,534 3,924 741 -1987 33,244 16,571 2,612 - 6,403 4,942 2,845 4,147 737 -1988 36,961 18,203 3,077 - 6,855 5,671 3,096 4,534 1,071 -1989 40,467 19,606 3,427 - 7,378 6,360 3,518 4,808 1,204 -1990 44,817 21,518 3,927 - 8,130 6,735 4,029 5,447 1,413 -1991 50,438 24,421 4,437 9,648 9,071 7,709 4,493 5,802 1,701 -1992 59,188 27,285 5,335 11,136 10,690 9,381 5,406 6,634 1,895 3,8251993 62,246 29,008 5,819 11,538 11,041 9,638 5,642 7,033 2,005 3,8641994 69,610 31,919 6,753 13,139 12,434 10,804 6,521 7,508 2,105 4,8501995 75,657 34,305 7,390 14,287 13,738 11,781 7,163 7,863 2,472 5,2971996 81,334 36,204 7,760 15,927 15,143 12,720 7,755 8,228 2,778 5,5901997 87,145 38,081 8,825 17,443 15,874 13,725 8,277 8,596 3,339 6,2661998 94,613 41,043 9,773 19,373 17,293 14,888 9,247 8,847 3,810 6,6601999 101,815 43,802 10,695 20,617 18,731 15,758 9,898 9,375 4,429 7,0292000 105,747 45,870 11,296 21,413 19,723 16,541 9,994 9,619 5,297 7,3062001 113,759 49,570 12,371 23,119 20,653 17,457 10,939 10,207 6,287 7,5532002 115,738 50,200 12,328 23,465 21,058 17,359 10,961 10,512 7,024 7,7892003 129,098 56,159 14,276 25,805 22,999 19,361 12,235 11,867 8,666 8,0862004 126,043 55,032 13,516 24,903 23,043 18,410 12,002 11,943 9,442 7,5222005 145,296 62,922 14,956 28,792 26,348 21,478 14,034 14,210 12,084 8,234- 328 -