ISFDB Age Graph

      Essays vs. Age (50% of titles used)

     |    |    |    |    |    |    |    |    |    |    |    |    |    |    |    |    |    
399  |    |    |    |    |    |  X |    |    |    |    |    |    |    |    |    |    |    
378  |    |    |    |    |    | XX |    |    |    |    |    |    |    |    |    |    |    
357  |    |    |    |    |    |XXXX|    |X   |    |    |    |    |    |    |    |    |    
336  |    |    |    |    |   X|XXXXXXX  XX   |    |    |    |    |    |    |    |    |    
315  |    |    |    |    |   XXXXXXXXXXXXXX  |    |    |    |    |    |    |    |    |    
294  |    |    |    |    |  XXXXXXXXXXXXXXXX |    |    |    |    |    |    |    |    |    
273  |    |    |    |    |XXXXXXXXXXXXXXXXXX |    |    |    |    |    |    |    |    |    
252  |    |    |    |    XXXXXXXXXXXXXXXXXXXXX    |    |    |    |    |    |    |    |    
231  |    |    |    |    XXXXXXXXXXXXXXXXXXXXX    |    |    |    |    |    |    |    |    
210  |    |    |    |  XXXXXXXXXXXXXXXXXXXXXXXX   |    |    |    |    |    |    |    |    
189  |    |    |    |  XXXXXXXXXXXXXXXXXXXXXXXXXX |    |    |    |    |    |    |    |    
168  |    |    |    | XXXXXXXXXXXXXXXXXXXXXXXXXXXX|X X |    |    |    |    |    |    |    
147  |    |    |   XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX|XXX |    |    |    |    |    |    |    
126  |    |    |  XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX |    |    |    |    |    |    |    
105  |    |    |  XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX   |    |    |    |    |    |    
84   |    |    | XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX X |    |    |    |    |    |    
63   |    |    | XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX    |    |    |    |    |    
42   |    |   XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX   X    |    |    |    |    
21   |   XX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX X    |X   |    |    |    
0    XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XX    |    
                                                                                          
     15   20   25   30   35   40   45   50   55   60   65   70   75   80