how many nations have received at least 1 gold medal?
9
Rank Nation Gold Silver Bronze Total
1 Japan 18 8 8 34
2 India 4 5 6 15
3 Philippines 4 3 3 10
4 Taiwan 2 6 7 15
5 South Korea 2 3 1 6
6 Thailand 2 2 0 4
7 Pakistan 2 1 0 3
8 Iran 2 0 2 4
9 Israel 1 0 1 2
10 Singapore 0 4 4 8
11 Malaysia 0 3 1 4
12 Iraq 0 2 0 2
13 Kampuchea 0 0 2 2
14 Nepal 0 0 1 1
csv/204-csv/183.tsv