The provided visual illustrates the proportion of man who took part in the enhancement of seniors in three different institutions:IBM ,Microsoft and Apple from 1980 to 2010.
Overall, it is clear that the figures of participants in high position Evolution in the IBM and the company manufacturing Apple products witnessed two different intensities of increase, with a huge development of IBM in slight change of Apple over years. The percentage of Microsoft employees joining this development also increased but clearly seen until 2010 .
Accordingly, with IBM in 1980 and 1985, its number was almostly zero, but in the next priod, the rate of men enrolling in senior reinforcement climbed rapidly. Specifically, from nearly 11% in 1990, this data rose to over 30% in the next 10 years and was double in the end .In contrast, why the Apple accounted for the large amount of joiners (about 15%) at first, it also reached to 25% after 30-year period.
Meanwhile, this number in Microsoft company grew up gradually in most time, but experienced a big jump in the last. Particularly, in the first 20 years, its number increase modestly, around 10-15%.A boom came with this company up to 2010 they achieve 45% workforce apply for senior development.