Table 29. Defined benefit plans: Eligibility requirements, private industry workers, National Compensation Survey, 2010 (All workers participating in defined benefit plans = 100 percent) Open to new employees Plans Plans not open to With Median No Age and open to Not Characteristics Total new minimum Median service minimum service new determin- employees age or age requirem- age or requirem- employees able service requirem- ent (in service ent not requirem- ent months) requirem- determin- ent ent able Worker characteristic All workers............................. 100 81 69 21 12 11 1 19 (1) Management, professional, and related... 100 73 61 21 12 10 1 27 – Management, business, and financial... 100 69 60 21 12 – – 31 – Professional and related.............. 100 74 62 21 12 11 1 26 – Service................................. 100 93 79 21 – – – – – Sales and office........................ 100 88 81 21 12 7 1 12 (1) Sales and related..................... 100 91 88 21 12 – – – – Office and administrative support..... 100 87 79 21 12 8 1 12 (1) Natural resources, construction, and maintenance............................. 100 87 64 21 12 23 1 – – Construction, extraction, farming, fishing, and forestry................. 100 97 74 21 12 – – – – Production, transportation, and material moving.................................. 100 79 65 21 12 13 (1) 21 – Transportation and material moving.... 100 97 82 21 12 – – – – Full time............................... 100 79 67 21 12 12 1 21 (1) Part time............................... 100 94 87 21 12 7 (1) – – Union................................... 100 90 74 21 12 15 1 10 (1) Nonunion................................ 100 76 66 21 12 9 1 24 – Average wage within the following categories:(2) Lowest 25 percent..................... 100 91 84 21 12 – – – – Second 25 percent..................... 100 87 78 21 12 9 1 13 – Third 25 percent...................... 100 85 72 21 12 13 (1) 15 (1) Highest 25 percent.................... 100 74 61 21 12 12 1 26 (1) Highest 10 percent.................. 100 68 56 21 12 10 1 32 – Establishment characteristic Goods-producing industries.............. 100 68 54 21 12 13 1 32 – Construction.......................... 100 100 82 – 12 – – – – Manufacturing......................... 100 63 50 21 12 12 1 37 – Service-providing industries............ 100 85 73 21 12 11 1 15 (1) Trade, transportation, and utilities.. 100 93 82 21 12 12 – – – Information........................... 100 63 45 – 12 – – 37 1 Financial activities.................. 100 93 88 21 12 – – 7 – Finance and insurance............... 100 94 89 21 12 – – 6 – Credit intermediation and related activities........................ 100 95 94 21 12 – – – – Insurance carriers and related activities........................ 100 90 79 21 12 – – – – Professional and business services.... 100 53 38 21 12 – – 47 – Education and health services......... 100 91 80 21 12 – – – – Educational services................ 100 98 64 21 – 34 – – – Junior colleges, colleges, and universities...................... 100 96 56 21 – 41 – – – Health care and social assistance... 100 91 82 21 12 – – – – 1 to 99 workers......................... 100 88 78 21 12 – – – – 1 to 49 workers....................... 100 88 82 21 12 – – – – 50 to 99 workers...................... 100 87 72 21 12 – – – – 100 workers or more..................... 100 79 66 21 12 12 1 21 (1) 100 to 499 workers.................... 100 83 72 21 12 10 2 17 – 500 workers or more................... 100 77 63 21 12 13 1 23 (1) Geographic area New England............................. 100 67 58 21 12 – – 33 – Middle Atlantic......................... 100 89 72 21 12 17 (1) 11 – East North Central...................... 100 82 73 21 12 7 2 18 – West North Central...................... 100 89 74 21 12 – – – – South Atlantic.......................... 100 80 71 21 12 9 (1) – – West South Central...................... 100 82 61 21 12 – – – – Mountain................................ 100 79 65 21 12 – – 21 (1) Pacific................................. 100 80 71 21 12 – – – – 1 Less than 0.5. 2 The categories are based on the average wage for each occupation surveyed, which may include workers with earnings both above and below the threshold. The average wages are based on the estimates published in the "National Compensation Survey: Occupational Earnings in the United States, 2009." See Technical Note for more details. NOTE: Because of rounding, sums of individual items may not equal totals. Dashes indicate that no data were reported or that data do not meet publication criteria. For definitions of major plans, key provisions, and related terms, see the "Glossary of Employee Benefit Terms" at www.bls.gov/ncs/ebs/glossary20102011.htm.