of government revenues came from offshore oil and gas, and these revenues continued to increase as the end of the century approached. It was estimated that the high rate of oil production could be sustained at least into the second decade of the 21st century, while that of natural gas was projected to increase dramatically and be sustained much longer. More than one-fourth of the huge investment made in Norwegian offshore operations by the mid-1990s went toward the development of the Troll gas field just west of Bergen, one of the largest offshore gas fields ever found. Its development ranked as one of the world's largest energy projects. With a water displacement of one million tons and a height of nearly 1,550 feet (475 m), the Troll A platform was the tallest concrete structure ever moved when it was towed into place in 1995. Gas deliveries from the Troll field made Norway a leading supplier of natural gas to continental Europe. Demographics {{Historical populations |footnote = Source: Statistics Norway . |shading = off |1769|193259 |1801|230053 |1855|392588 |1900|560765 |1950|811411 |1960|887537 |1970|961676 |1980|1033902 |1990|1089763 |2000|1159176 |2010|1263464 |2020?|1397393 |2030?|1525853 }} Western Norway has one of the highest population growth rate in Norway for 2009, 1.44%, while the country as a whole is 1.20%. The population 1. January 2010 is 1,263,464. 37.7% of the population lived in Hordaland, 33.8% in Rogaland, 19.8% in Møre og Romsdal, and 8.4% in Sogn og Fjordane. 60% of the population are under 40 years old, and 30% are under 20 years old. Many of the historical immigrants in Western Norway came from countries like Scotland, England, Netherlands, Germany, Denmark and Sweden, and Western Norway is still the part of Norway who has the largest immigration from the western world. Language Western Norway is also notable for the extensive use of the Nynorsk variant of the Norwegian language: Most of the Nynorsk users in Norway (87%) live in Western Norway. But in spite of this the majority of the inhabitants here (56%) use Bokmål (because Bokmål is predominant in the cities). In Sogn og Fjordane (without larger cities) the use of Nynorsk is predominant (97%), and the users of Nynorsk is also a majority in Møre og Romsdal (54%). But in Hordaland and Rogaland the users of Nynorsk are a minority (42% and 26%, respectively). The percentage would be higher if the numbers excluded the northern areas of Møre