Final answer:
The provided information does not contain details about the percentage of engineers acting as managers in 1969; further research in historical records is required to answer this specific question.
Step-by-step explanation:
The question seems to be related to the engineering profession and its management roles in the historical context of the United States.
Unfortunately, the provided information does not include data from a 1969 survey regarding the percentage of engineers who were acting as managers.
Instead, the given data presents various statistics on preferences for trucks among different worker categories from a survey, a college professor's claim regarding his students' passing rates.
The number of engineering graduates in the United States after 2005-2006, the founding of engineering trade organizations, concerns about globalization and manufacturing, and trends in the average age of corporate executives.
To accurately answer the question about the percentage of engineers acting as managers in 1969, one would need to access historical surveys or statistical records from that period, which could potentially be found in library archives, historical databases, or industry-specific publications.