Ratio of Workers Over 55 Years Old- Top and Bottom 10 Industries (%),,,,,

1970,,,,,
Top 10 industries,,,Bottom 10 industries,,
107,Other (non-profit),32.7,73,Railway,2
2,Miscellaneous crop farming,31.7,76,Air transportation,2.2
3,Livestock and sericulture farming,31.6,27,Chemical fibers,3
1,"Rice, wheat production",31.5,51,Semiconductor devices and integrated circuits,3.5
71,Real estate,29.1,52,Electronic parts,3.6
4,Agricultural services,23.7,49,Communication equipment,3.6
5,Forestry,22.9,48,"Electronic data processing machines, digital and analog computer equipment and accessories",3.8
95,Accommodation,21.5,50,Electronic equipment and electric measuring instruments,3.9
97,Other services for individuals,20.8,47,Household electric appliances,4
82,Medical (private),19.6,30,Petroleum products,4.3

1980,,,,,
Top 10 industries,,,Bottom 10 industries,,
2,Miscellaneous crop farming,42.5,76,Air transportation,3.3
1,"Rice, wheat production",42.3,27,Chemical fibers,4
3,Livestock and sericulture farming,42.2,69,Finance,5.1
5,Forestry,32.7,51,Semiconductor devices and integrated circuits,5.3
107,Other (non-profit),31.3,52,Electronic parts,5.4
71,Real estate,31.3,49,Communication equipment,5.4
95,Accommodation,26.6,47,Household electric appliances,5.6
97,Other services for individuals,22.9,30,Petroleum products,5.7
4,Agricultural services,22.2,48,"Electronic data processing machines, digital and analog computer equipment and accessories",5.7
16,Lumber and wood products,22.2,50,Electronic equipment and electric measuring instruments,6

1990,,,,,
Top 10 industries,,,Bottom 10 industries,,
1,"Rice, wheat production",62.8,76,Air transportation,5.6
2,Miscellaneous crop farming,61.5,73,Railway,6.4
3,Livestock and sericulture farming,60.7,51,Semiconductor devices and integrated circuits,6.9
5,Forestry,53.1,52,Electronic parts,6.9
4,Agricultural services,39.9,91,Information services and internet-based services,7
10,Flour and grain mill products,37.7,49,Communication equipment,7
6,Fisheries,37,14,Tobacco,7.2
107,Other (non-profit),35.1,48,"Electronic data processing machines, digital and analog computer equipment and accessories",7.4
71,Real estate,33.7,50,Electronic equipment and electric measuring instruments,7.7
16,Lumber and wood products,33.5,69,Finance,7.8

2000,,,,,
Top 10 industries,,,Bottom 10 industries,,
1,"Rice, wheat production",71.7,76,Air transportation,8.5
3,Livestock and sericulture farming,69.8,62,Electricity,9.3
2,Miscellaneous crop farming,68.5,69,Finance,9.6
5,Forestry,60.3,91,Information services and internet-based services,9.7
6,Fisheries,49.4,52,Electronic parts,10.5
10,Flour and grain mill products,43.9,51,Semiconductor devices and integrated circuits,10.5
71,Real estate,43.5,49,Communication equipment,10.8
4,Agricultural services,40.3,48,"Electronic data processing machines, digital and analog computer equipment and accessories",10.8
21,Leather and leather products,39.8,78,Telegraph and telephone ,10.9
107,Other (non-profit),37.7,100,Medical (public),11