The 1945 election trebled their number to twenty-four, but then it plateaued out. Hampered without additional manufacturing capacity, Trek sales plateaued in the late 1970s. Growth in aquaculture increased rapidly in the 1990s when the rate of wild capture plateaued. Despite its promising start, "Fresh Horses" plateaued quickly, topping out at quadruple platinum. Recent data, however, shows that international health aid has plateaued and may begin to decrease. Sales had plateaued, although they were still fairly impressive at the time. Indications are that Freesat penetration largely plateaued in late 2010. Attendance plateaued throughout the first half of the 1990s. From its founding, Newport's population plateaued around 5,000 people until 1950 when it started dropping. Political oppression plateaued in the 1960s and wound down only in the early 1990s. However, her singles career plateaued after 1999. The figures plateaued during the subsequent weaker economic climate and had hardly changed by 2012. Recently nitrogen fertilizers have plateaued in most developed countries. Female reproductive success, on the other hand, plateaued after a single mate. By the middle Devonian, the tracheid diameter of some plant lineages (Zosterophyllophytes) had plateaued.