The Luhn Formula: 1  Drop the last digit from the number. The last digit is what we want to check against. 2  Reverse the numbers. 3  Multiply the digits in odd positions (1, 3, 5, etc.) by 2 and subtract 9 to all any result higher than 4  9. Add all the numbers together.
Australia Exports of Goods and Services is at 19.79%, compared to 20.90% last year. This is higher than the long term average of 16.23%. Categories: Components of GDP, International Transactions. Region: Australia. Report: World Development Indicators.
Trade is moderately important to Indonesiaâs economy; the value of exports and imports taken together equals 42 percent of GDP. The average applied tariff rate is 2.3 percent. Foreign investment in several sectors of the economy is restricted, and state-owned enterprises distort the economy.