On the sociolinguistic level, the language has been classified as a dialect of Serbo-Croat. The Montenegrin constitution currently defines Montenegrin as the official language. Since the campaign for independence, a movement for recognition of the Montenegrin language as wholly separate from Serbian and other standard variants of Serbo-Croat (Bosnian, Croatian) has emerged, finding the basis for separate language identity mostly in the above-mentioned dialectal specifics. In the 2011 census, 42.88% of Montenegrin citizens stated that they speak the Serbian language, while 36.97% stated that they speak Montenegrin. Most of the young people under 18 in Montenegro, 39.23 percent, say they speak Montenegrin, while 37.47% call their mother tongue Serbian, as shown in the census held from 1 to 15 April 2011.