Calcul
Années Bois Métal Acier TOTAL MOYENNE
1960
50
73
49
172
57
1970
55
71
60
186
62
1980
49
75
55
179
60
1990
35
26
71
132
44
2000
54
41
66
161
54
2010
53
48
60
161
54
2020
43
73
41
157
52
∑ = 339
∑ = 407
∑ = 402
∑ = 1.148
Avg = 48,43
Avg = 58,14
Avg = 57,43
Avg = 164
Min = 35
Min = 26
Min = 41
Min = 132
Max = 55
Max = 75
Max = 71
Max = 186