Table 2.

Frequency of answers to the question "Have you ever thought about suicide?" in the years 1994, 1998 and 2002

Level of suicidality	Category of the answer	1994		1998		2002		Total
		N	%	N	%	N	%	N	%
Non suicidal	'Have never thought about that'	3269	60.4	2660	59.3	3722	67.5	9651	62.6
Low level of suicidality	'Sometimes have had such thoughts'	1706	31.5	1387	30.9	1332	24.1	4425	28.7
High level of suicidality	'Have frequently thought about suicide'	224	4.2	203	4.5	218	4.0	645	4.2
	'I have thought about suicide seriously, even made plans how to carry it out'	164	3.0	154	3.5	150	2.7	468	3.0
	'Tried to commit suicide'	50	0.9	79	1.8	96	1.7	225	1.5
Total		5413	100.0	4483	100.0	5518	100.0	15414	100.0

Test for homogeneity of the prevalence of answers in 1994, 1998 and 2002: χ² = 118.0; df = 8; p < 0.001.