Iranian car companies produced 1,090,846 cars and commercial vehicles, of which 925,975 were cars and 164,871 were other vehicles. More than half of the vehicles in Iran are over 10 years old (2009). The government has sought to upgrade the local fleet and the authorities aim to pull some 200,000 outmoded vehicles off the road each year, underpinning demand. According to estimates the demand stood at 1.5 million vehicles in 2007, which could not be met by the local producers. Auto manufacturing industry's share in gross national product is two percent and Iran's auto production rate in the global markets is 1.7 percent (2008). Previously buyers had been purchasing vehicles outright in cash, but now over half of all new car sales are through finance companies or on lease purchase schemes. Motorcycles There were more than 8 million motorcycles in Iran by 2010 and 1,500 motorcycles receive registration number plates each day. Motorcycles account for 30% of air pollution in Tehran. Domestically manufactured motorcycles conform to Euro 2 standard and they don't even use catalyst transducers while the world has now considered Euro 5 standard for motorcycles. Exports In 2007, Iran car exports stood at around $500 million. Iran car exports reached $1 billion by March 2009. Overall production is expected to rise to 1.13 million units by 2012 ($200 million in exports expected by 2010) and 60,000 units exported by 2013. Auto parts Sapco and Sazeh Gostar are the respective purchasing arms of Iran Khodro and Saipa (the two largest Iranian auto manufacturers). The Iranian automotive parts industry consists of approximately 1200 companies (15,000 factories), which include those affiliated to vehicle manufacturers as well as independent firms. The industry consists of two primary sectors: Original Equipment Manufacturing (OEM) suppliers, which produce parts for auto makers, and After-Market Parts Manufacturers (AMPM), which produce replacement parts for vehicles. Over 39 countries purchase Iranian auto parts (2008). As of 2014, 10 tire manufacturing units are operating across the country with a production capacity of 240,000 tons per annum. They meet 70 percent of the domestic tire demand (11 million tires per year). As of 2015, 60% of auto spare parts in the Iranian market are imported from foreign countries. Most cars are produced in Iran under licence from foreign manufacturers and it depends on them for critical imports, ranging from pistons, cylinder heads, valves, starters, alternators, airbags to computer chips (incl. engine