Table 4 Percentage of population by area and occupation: 1960-1990 census years.
 
Census years Area Occupation
Municipal area Non-Municipal area Agricultural area Others
1960 12.5 87.5 82.3 17.7
1970 13.2 86.8 79.4 20.6
1980 17 83 72.3 27.7
1990 18.7 81.3 67.3 32.7
       
Source : Population and Housing census 1960, 1970, 1980 and 1990, National Statistical Office.