So, I've done it.
Table of the best goal-scorers of the NHL from 1942-1943 to 2015-2016 seasons.
The point of the table is the ratio between GPG of the best goal-scorer of corresponding season and GPG of all goalscorers, scored 80% of goals of the same season.
As we see, the method works no matter what season do we take and what was the size of the league.
1942-1943 was taken as the first year of Richard career. Don't see the point to calculate earlier seasons.
67-68 and 68-69 were calculated by Hippasus. Many thanks to him.
1| 90-91| Brett Hull| 379,21
2 |83-84 |Gretzky| 346,60
3 |95-96 |Lemieux| 344,11
4 |88-89 |Lemieux| 329,88
5 |99-00| Bure |324,54
6 |07-08 |Ovechkin |323,96
7 |70-71 |Esposito| 323,67
8 |81-82| Gretzky |315,88
9 |91-92 | Brett Hull |312,86
10 |11-12| Stamkos| 303,20
11 |97-98| Selanne |301,77
12 |71-72| Esposito |292,44
13 |66-67 | Bobby Hull| 290,95
14 |14-15| Ovechkin| 289,08
15 |00-01| Bure| 285,93
16 |73-74| Esposito |285,86
17 |87-88| Lemieux| 282,84
18 |13-14| Ovechkin| 282,01
19 |52-53|Gordie Howe| 281,86
20 |12-13| Ovechkin| 281,78
21 |92-93| Selanne| 281,45
22 |15-16| Ovechkin| 278,88
23 |84-85| Gretzky| 276,41
24 |08-09| Ovechkin| 275,91
25 |01-02 | Iginla| 275,50
26 |79-80 |Simmer |273,05
27 |78-79 | Bossy| 272,84
28 |89-90 | Brett Hull| 272,29
29 |93-94 | Bure |271,48
30 |82-83| Gretzky| 267,83
31 |60-61 | Bernie Geoffrion| 263,47
32 |85-86| Kurri| 257,61
33 |68-69 | Bobby Hull| 256,67
34 |86-87| Gretzky| 255,51
35 |76-77| Shutt| 255,28
36 |09-10| Crosby |255,10
37 |55-56| Jean Beliveau| 253,55
38 |05-06| Cheechoo| 253,43
39 |65-66 | Bobby Hull| 253,16
40 |77-78| Lafleur| 252,21
41 |10-11| Perry| 250,90
42 |96-97| Tkachuk |250,77
43 |80-81| Bossy| 250,08
44 |02-03| Hejduk| 246,88
45 |94-95| Bondra| 246,62
46 |51-52| Gordie Howe| 245,79
47 |06-07| Lecavalier| 245,05
48 |44-45| Maurice Richard| 244,14
49 |74-75| Esposito| 240,49
50 |61-62| Bobby Hull| 238,89
51 |50-51| Gordie Howe| 237,05
52 |75-76 | Leach| 236,27
53 |56-57| Gordie Howe| 233,25
54 |58-59 | Jean Beliveau| 231,71
55 |49-50| Maurice Richard| 227,80
56 |67-68| Bobby Hull| 225,04
57 |98-99| Selanne| 224,04
58 |03-04| Kovalchuk| 222,68
59 |46-47 | Maurice Richard |222,05
60 |63-64| Bobby Hull| 220,55
61 |53-54 | Maurice Richard| 219,85
62 |72-73| Esposito| 217,62
63 |54-55| Bernie Geoffrion| 213,65
64 |45-46| Gaye Stewart| 211,40
65 |64-65| Norm Ullman| 206,93
66 |47-48| Ted Lindsay| 195,17
67 |59-60| Bobby Hull| 194,27
68 |69-70| Esposito| 189,69
69 |57-58| Dickie Moore| 178,86
70 |62-63| Gordie Howe| 178,04
71 |42-43| Doug Bentley| 170,76
72 |41-42| Doug Bentley| 164,10
73 |48-49 | Sid Abel| 162,96