Table:
text: 1981 World Wrestling Championships
Medal table
Medal table
Rank_ Nation Gold Silver Bronze Total
1 Soviet Union 12 0 4 16
2 West Germany 2 0 0 2
3 Bulgaria 1 5 1 7
4 Yugoslavia 1 2 1 4
5 Japan 1 1 2 4
5 United States 1 1 2 4
7 East Germany 1 1 1 3
7 Hungary 1 1 1 3
9 Finland 0 2 2 4
9 Poland 0 2 2 4
11 Czechoslovakia 0 1 0 1
11 Iran 0 1 0 1
11 South Korea 0 1 0 1
11 Sweden 0 1 0 1
11 Turkey 0 1 0 1

text: 1981 World Wrestling Championships
Medal table
Medal table
Rank_ Nation Gold Silver Bronze Total
16 Romania 0 0 2 2
17 Austria 0 0 1 1
17 Mongolia 0 0 1 1
Total Total 20 20 20 60

Question: What is the average total for the 1981 World Wrestling Championships if gold is 0 and if nation is Iran?