Table:
text: 1990 World Wrestling Championships
Medal table
Medal table
Rank_ Nation Gold Silver Bronze Total
16 Finland 0 1 0 1
16 South Korea 0 1 0 1
16 Venezuela 0 1 0 1
19 Yugoslavia 0 0 2 2
20 Argentina 0 0 1 1
20 Mongolia 0 0 1 1
20 Poland 0 0 1 1
20 Turkey 0 0 1 1
Total Total 29 29 29 87

Question: What is the average total number of bronze medals for all nations at the 1990 Wrestling World Championships?