Full list of number of top tens per country with number of wins between brackets:
198 - Italy (19)
157 - France (7)
153 - Belgium (14)
106 - Spain (10)
97 - Australia (17)
85 - Netherlands (9)
68 - Great Britain (13)
43 - Colombia (4)
38 - Germany (6)
29 - USA (1)
27 - Poland (2)
24 - Russia (1)
21 - Argentina (4), Slovenia (1), Denmark (0), Portugal (0)
20 - Norway (5), South Africa (0)
19 - New Zealand (2)
16 - Slovakia (1)
14 - Luxembourg (4), Switzerland (2)
13 - Belarus (3), Iran (2), Eritrea (0)
12 - Czech Republic (1)
11 - Algeria (2), Ireland (1)
10 - Japan (0)
7 - Lithuania (0)
6 - Tunisia (3), Austria (1), South Korea (1), Canada (0), Kazakhstan (0), Malaysia (0), Ukraine (0)
5 - Estonia (1)
4 - Brazil (1), Morocco (0), Rwanda (0)
3 - Indonesia (0), Turkey (0)
2 - China (0), Greece (0), Namibia (0), Romania (0), Taiwan (0)
1 - Chile (0), Costa Rica (0), Dominican Republic (0)
198 - Italy (19)
157 - France (7)
153 - Belgium (14)
106 - Spain (10)
97 - Australia (17)
85 - Netherlands (9)
68 - Great Britain (13)
43 - Colombia (4)
38 - Germany (6)
29 - USA (1)
27 - Poland (2)
24 - Russia (1)
21 - Argentina (4), Slovenia (1), Denmark (0), Portugal (0)
20 - Norway (5), South Africa (0)
19 - New Zealand (2)
16 - Slovakia (1)
14 - Luxembourg (4), Switzerland (2)
13 - Belarus (3), Iran (2), Eritrea (0)
12 - Czech Republic (1)
11 - Algeria (2), Ireland (1)
10 - Japan (0)
7 - Lithuania (0)
6 - Tunisia (3), Austria (1), South Korea (1), Canada (0), Kazakhstan (0), Malaysia (0), Ukraine (0)
5 - Estonia (1)
4 - Brazil (1), Morocco (0), Rwanda (0)
3 - Indonesia (0), Turkey (0)
2 - China (0), Greece (0), Namibia (0), Romania (0), Taiwan (0)
1 - Chile (0), Costa Rica (0), Dominican Republic (0)