Managers and professionals tend not to last as long. There are more professions where people decide not to stay as long or decide to some degree to retire at 65. This would be office staff, technologists and professional technicians and managers.
As to industrial sectors where more people expect to retire at 65 or older, it would be 50% of people in professional services and business services. In public administration, consumer services, health care and education, fewer people expect to retire at 65 or older.