Table 1. National Survey of the Japanese Elderly response rates of men and women 60 years or older, 1987–2002.

Wave (year)	Continueda or additional	n	No. of participants providing valid responses (%)
1 (1987)	–	3288	2200 (66.9)
2 (1990)	Continued	2200	1671 (76.0)
	Additional	580	366 (63.1)
3 (1993)	Continued	2441	1864 (76.4)
4 (1996)	Continued	2226	1549 (69.6)
	Additional	1210	898 (74.2)
5 (1999)	Continued	2969	2077 (70.0)
	Additional	2000	1405 (70.3)
6 (2002)	Continued	4336	2823 (65.1)

^a Number of responses in continued waves takes account of the deaths of some respondents between waves.