Nintendo and Sega profitability between FY '86 and FY '01 when Sega abandoned the console business:
Nintendo FY changed from ending in August to March in FY '90
Sega FY changed from ending in April to March in FY '91
Sources:
Nintendo: http://www.nintendo.co.jp/ir/library/historical_data/xls/consolidated_pl_e1403.xls
Sega: http://gyousekiman.blog133.fc2.com/blog-entry-163.html
EDIT:
For both I took consolidated statement.
The previous graph on the same subject I did had non-consolidated data for Sega.
Note:
Nintendo FY changed from ending in August to March in FY '90
Sega FY changed from ending in April to March in FY '91
Sources:
Nintendo: http://www.nintendo.co.jp/ir/library/historical_data/xls/consolidated_pl_e1403.xls
Sega: http://gyousekiman.blog133.fc2.com/blog-entry-163.html
EDIT:
For both I took consolidated statement.
The previous graph on the same subject I did had non-consolidated data for Sega.