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TABLE E21

Percentage Distribution of Active Participants in Single Employer Plans with 100 or More Participants *by vesting status, 1978-1997*
Year	All Plans				Defined Benefit Plans				Defined Contribution Plans
Year	Total	Fully Vested	Partially Vested	Not Vested	Total	Fully Vested	Partially Vested	Not Vested	Total	Fully Vested	Partially Vested	Not Vested
1978	100	47	12	40	100	41	5	53	100	57	25	18
1979	100	48	13	39	100	41	6	53	100	58	26	17
1980	100	47	14	39	100	40	6	54	100	58	25	17
1981	100	48	14	38	100	41	5	54	100	57	26	17
1982	100	49	14	36	100	42	5	53	100	59	25	17
a
1983	100	54	14	33	100	43	6	51	100	64	22	14
1984	100	56	14	30	100	44	6	50	100	67	20	13
1985	100	57	14	29	100	43	6	51	100	68	20	12
1986	100	58	14	28	100	44	6	50	100	70	19	11
1987	100	58	13	28	100	46	6	49	100	68	20	12
a
1988	100	60	12	28	100	50	4	46	100	68	19	13
1989	100	67	10	24	100	61	2	37	100	71	15	14
1990	100	68	9	23	100	62	2	36	100	72	14	14
1991	100	68	10	22	100	65	2	33	100	70	15	15
1992	100	69	10	21	100	67	2	32	100	70	15	15
a
1993	100	70	10	19	100	69	2	29	100	71	15	14
1994	100	71	10	19	100	71	1	28	100	71	14	15
1995	100	70	11	20	100	71	1	27	100	69	15	16
1996	100	72	12	16	100	72	1	27	100	72	17	11
1997	100	68	12	21	100	70	1	29	100	67	16	17

SOURCE: Form 5500 series reports filed with the Internal Revenue Service for 1978-97 plan years.