This figure matches the findings from 2011, although the total case files opened did decrease from 392 (2011) to 378 (2012).
Depression (13%) and alcohol (6%) were the two most frequent problems reported behind stress, with other issues making up the remaining 12%.
It was revealed that of the 272 callers who identified a specific cause of their problem, workload (28%), financial problems (19%), disciplinary issues (14%) and bullying (14%) were the most common issues.
Other reasons cited were ethical issues (8%), redundancy (7%) and relationship problems (6%).
In regards to professions, lawyers working in litigation accounted for the highest number of calls (17%) followed by commercial (15%) and high street and private client (12%).
The figures show that 35% of callers were trainees or had been qualified for five years or less, and of the callers who complained of stress, 37% had been qualified for more than a decade.
The data also showed that 62% of callers were female and 38% male.