10.6% to and from North America and 10.1% to and from Asia; cargo volume was mainly between Schiphol and Asia (46.3%) and North America (17.6%). In 2019, 102 carriers provided a total of 332 destinations on a regular basis. The airport is built as one large terminal (a single-terminal concept), split into three large departure halls, which connect again once airside. The most recent of these was completed in 1994 and expanded in 2007 with a new section, called Terminal 4, although it is not considered a separate building. A new pier is to be opened in 2019 with a terminal extension planned to be operational by 2023. Plans for further terminal and gate expansion exist, including the construction of a separate new terminal between the Zwanenburgbaan and Polderbaan runways that would end the one-terminal concept. Because of intense traffic and high landing fees (due to the limit of 500,000 flights a year), some low-cost carriers decided to move their flights to smaller airports, such as Rotterdam The Hague Airport and Eindhoven Airport. Many low-cost carriers, such as EasyJet and Ryanair, however, continue to operate at Schiphol, using the low-cost H pier. Lelystad Airport is currently being expanded aimed at accommodating some of the low-cost and leisure flights currently operating out of Schiphol, eventually taking up to 45,000 flights a year. History Early years Before 1852, the entire polder of Haarlemmermeer in which the airport lies was a large lake with some shallow areas. There are multiple stories of how the place got its name. The most popular story is that in the shallow waters sudden violent storms could claim many ships. Winds were particularly strong in the Schiphol area since the prevailing wind direction is from the south-west, and Schiphol lies in the north-eastern corner of the lake. In English, translates to 'ship hole', a reference to many ships supposedly lost in the lake. When the lake was reclaimed, however, no shipwrecks were found. Another possible origin of the name is the word . A is a ditch or small canal in which ships would be towed from one lake to another. A third explanation would be that the name derived from the words . This is a low-lying area of land () from where wood would be obtained to build ships. After the lake was dredged in the mid-1800s, a fortification named Fort Schiphol was built in the