Question: Which airport is a key component to 7th least corrupt economy in the world?

Context paragraphs:
Corruption in New Zealand: Transparency International uses a Corruption Perceptions Index (CPI) to compare levels of economic crime in different countries and has consistently ranked New Zealand as one of the least corrupt countries in the world.

List of companies based in Idaho: This is a list of companies based in Idaho.  Idaho is a state in the northwestern region of the United States.  It is the 14th largest, the 39th most populous, and the 7th least densely populated of the 50 United States.  The United States Census Bureau estimates that the population of Idaho was 1,654,930 as of July 1, 2015, up from 1,595,728 on July 1, 2012, a 1.8% increase since 2010.  The state's largest city and capital is Boise.  Today, the largest industry in Idaho is the science and technology sector.  It accounts for over 25% of the state's total revenue and over 70% of the state's exports.  Idaho's industrial economy is growing, with high-tech products leading the way.  Idaho is an important agricultural state, producing nearly one-third of the potatoes grown in the United States.

Economy of Taiwan: The economy of the Republic of China (Taiwan), simply called Taiwan, is the 7th largest economy in Asia, and is included in the advanced economies group by the International Monetary Fund and gauged in the high-income economies group by the World Bank, and ranked 15th in the world by the Global Competitiveness Report of World Economic Forum, has a developed capitalist economy that ranks as the 22th-largest in the world by purchasing power parity (PPP), ranks as 18th in the world by gross domestic product (GDP) at purchasing power parity per capita (person), and 24th in nominal GDP of investment and foreign trade by the Republic of China (ROC) government, commonly referred to as Taiwan.  The economy of Taiwan ranks the highest in Asia for 2015 Global Entrepreneurship Index (GEI) for specific strengths.  Most large government-owned banks and industrial firms have been privatized.  With the technocracy-centered economic planning under martial law until 1987, real growth in GDP has averaged about 8% during the past three decades.  Exports have grown even faster and since World War II, have provided the primary impetus for industrialization.  Inflation and unemployment are low; the trade surplus is substantial; and foreign reserves are the world's fourth largest.  Agriculture contributes 3% to GDP, down from 35% in 1952, and the service sector makes up 73% of the economy.  Traditional labor-intensive industries are steadily being moved off-shore and replaced with more capital- and technology-intensive industries.  Economy of Taiwan is an indispensable partner in the Global Value Chains of Electronics Industry.  Electronic components and personal computer are two areas of international strength of Taiwan's Information Technology industry, which means the economy of Taiwan has the competitive edge on having the learning curve from advanced foreign technologies with lower cost to be produced and sold abroad.  Institute for Information Industry with its international recognitions is responsible for the development of IT industry and ICT industry in Taiwan.  Industrial Technology Research Institute with its global partners is the advanced research center for applied technology for the economy of Taiwan.  Directorate-General of Budget, Accounting and Statistics and Ministry of Economic Affairs release major economic indicators of the economy of Taiwan.  Chung-Hua Institution for Economic Research provides economic forecast at the forefront for the economy of Taiwan and authoritatively researches on the bilateral economic relations with ASEAN by The Taiwan ASEAN Studies Center (TASC).  Taiwan Stock Exchange is the host to the listed companies of local industries in Taiwan with weighted financial exposures to the FTSE Taiwan Index and MSCI Taiwan Index.

Corruption in Canada: The Corruption Perceptions Index ranks Canada in the top 10 least corrupt countries in the world.  In recent years, corruption is increasingly a problem in government, industry and non-governmental organizations.  For instance, in 2013, the World Bank blacklisted SNC-Lavalin and its subsidiaries from "bidding on its global projects under its fraud and corruption policy" due to the Padma Bridge scandal.  Canada also ranks at the bottom of the bribery-fighting rankings, "with little or no enforcement of anti-bribery measures".  The 2014 Ernst & Young global fraud survey found that "twenty percent of Canadian executives believe bribery and corruption are widespread in this country".  According to a study by the Graduate School of Public Policy at the University of Saskatchewan, "a large proportion of Canadians see their politicians and their institutions as fundamentally corrupt".

Corruption in Kenya: Political corruption in the post-colonial government of Kenya has had a history which spans the era of the Jomo Kenyatta and Daniel arap Moi's KANU governments to Mwai Kibaki's PNU government.  In the Corruption Perceptions Index 2012 Kenya is ranked 139th out of 176 countries for corruption, tied with Azerbaijan, Nepal, Nigeria, and Pakistan (least corrupt countries are at the top of the list).

Economy of Singapore: Singapore has a highly developed trade-oriented market economy.  Singapore's economy has been ranked as the most open in the world, 7th least corrupt, most pro-business, with low tax rates (14.2% of Gross Domestic Product, GDP) and has the third highest per-capita GDP in the world in terms of Purchasing Power Parity (PPP).  APEC is headquartered in Singapore.

Taxation in China: Taxes provide the most important revenue source for the Government of the People's Republic of China.  As the most important source of fiscal revenue, tax is a key component of macro-economic policy, and greatly affects China's economic and social development.  With the changes made since the 1994 tax reform, China has preliminarily set up a streamlined tax system geared to the socialist market economy.

Aviation in Singapore: Aviation in Singapore is a key component of the Singaporean economy in its quest to be a transport hub of the Asian region.  Besides currently the sixth busiest airport and the fourth busiest air cargo hub in Asia, the Singaporean aviation industry is also a significant aerospace maintenance, repair and overhaul centre.

Employment and Social Insurance Act: The Employment and Social Insurance Act was a statute, enacted by the Parliament of Canada in 1935, during the final months of the government of R.B. Bennett.  The Act was intended to introduce a nationwide employment insurance scheme, and also to convince voters that Bennett was willing to intervene aggressively in the economy, as President Roosevelt had done in the United States with the New Deal.  The Act was a key component of the program of interventionist laws known as "Bennett's New Deal."

Nevada: Nevada (Spanish for "snowy"; see pronunciations) is a state in the Western, Mountain West, and Southwestern regions of the United States of America.  Nevada is the 7th most extensive, the 34th most populous, but the 9th least densely populated of the 50 United States.  Nearly three-quarters of Nevada's people live in Clark County, which contains the Las Vegas–Paradise metropolitan area where three of the state's four largest incorporated cities are located.  Nevada's capital is Carson City.  Nevada is officially known as the "Silver State" because of the importance of silver to its history and economy.  It is also known as the "Battle Born State", because it achieved statehood during the Civil War (the words "Battle Born" also appear on the state flag); as the "Sagebrush State", for the native plant of the same name; and as the "Sage-hen State".  Nevada borders Oregon to the northwest, Idaho to the northeast, California to the west, Arizona to the southeast and Utah to the east.

Supporting paragraphs: Aviation in Singapore Economy of Singapore
Answer: Aviation in Singapore