"CensusYear","CountryName","Average"
"1871","Belgium","0"
"1881","Belgium","0"
"1891","Belgium","0"
"1901","Belgium","0"
"1911","Belgium","46"
"1921","Belgium","39"
"1933","Belgium","41"
"1947","Belgium","45"
"1954","Belgium","31"
"1961","Belgium","30"
"1966","Belgium","0"
"1971","Belgium","34"
"1976","Belgium","36"
"1981","Belgium","39"
"1986","Belgium","42"
"1991","Belgium","44"
"1996","Belgium","46"
"2001","Belgium","47"
"2006","Belgium","49"
"2011","Belgium","48"