In 1970, Camarines Sur was the only province with close to a million population. Albay, which was next in rank, reached the 1970 population level of Camarines Sur only 20 years later. Masbate and Sorsogon were in the same level every census year from 1970 to 1980. It is noteworthy that distribution and growth of the 1970 population were towards areas that were sparsely populated but agriculturally rich and/or endowed with fishery resources. The island province of Catanduanes and its municipalities have exhibited very low population growth from 1970 to 1980.