Reason:
1. According to the statistics of the World Monetary Fund in 20 13-20 14 (unpublished in 20 15), Luxembourg's per capita GDP has always been the highest in the world.
2. Luxembourg's financial activities are very prosperous and the tertiary industry is developed. With large-scale international credit and the issuance of European foreign exchange bonds as its pillar industries, it is the seventh largest financial center in the world.
3. Luxembourg has a small population, with a total population of only 524,800; The total gdp level is high, with a total GDP of 58,465,438 USD +0.2 billion.