Plans with fewer or more than 500 participants: Architecture and engineering: 89% of plans with fewer than 500 participants offered automatic increases; 72% of plans with 500 or more participants offer automatic increases. Construction: 78% of plans with fewer than 500 participants offered automatic increases; 62% of plans with 500 or more participants offered automatic increases. Finance: 52% of plans with fewer than 500 participants offered automatic increases; 72% of plans with 500 or more participants offered automatic increases. Professional, scientific, and technical services: 65% of plans with fewer than 500 participants offered automatic increases; 68% of plans with 500 or more participants offered automatic increases. Unions: 67% of plans with fewer than 500 participants offered automatic increases; 68% of plans with 500 or more participants offered automatic increases. Wholesale trade: 58% of plans with fewer than 500 participants offered automatic increases; 80% of plans with 500 or more participants offered automatic increases. Vanguard benchmark: 69% of all plans offered automatic increases.