Annual production


                                                1    ----55
                                                1
                                                1
                                                1
                                                1
                                                1    ----50
                                                1
                                                1
                                                1
                                                1   1
                                                1   1----45
                                                1   1
                                                1   1
                                                1   1
                                                1   1 
                                              1 1   1----40
                                              1 1   1
                                              1 1   1
                                              1 1   1
                                              1 1   1
                                              1 1   1----35
                                              1 1 1 1
                                              1 1 1 1
                                              1 1 1 1
                                              1 1 1 1
                                              1 1 1 1----30
                                          1   1 1 1 1
                                          1   1 1 1 1
                                          1   1 1 1 1
                                          1   1 1 1 1
                                          1   1 1 1 1----25
                                          1   1 1 1 1
                                          1   1 1 1 1
                                          1 1 1 1 1 1
                                          1 1 1 1 1 1
                                          1 1 1 1 1 1----20
                                          1 1 1 1 1 1
                                          1 1 1 1 1 1
                                          1 1 1 1 1 1
                                          1 1 1 1 1 1
                                          1 1 1 1 1 1----15
                                          1 1 1 1 1 1
                                        1 1 1 1 1 1 1         Number of
                                  1     1 1 1 1 1 1 1         publications
                                  1     1 1 1 1 1 1 1         per year
                                  1     1 1 1 1 1 1 1----10
                                  1 1   1 1 1 1 1 1 1
                                  1 1 1 1 1 1 1 1 1 1
                                  1 1 1 1 1 1 1 1 1 1
                                  1 1 1 1 1 1 1 1 1 1
                                  1 1 1 1 1 1 1 1 1 1 1-- 5
                                1 1 1 1 1 1 1 1 1 1 1 1
            1       1     1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
            1     1 1 1   1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1  1  1  1  1     1 1 1   1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
-  -  -  -  --------------------------------------------- 0
4  4  6  6  7 7 7 8 8 8 8 8 8 8 8 8 8 9 9 9 9 9 9 9 9 9
8  9  3  8  7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8
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Armel Le Bail