Table 1.

Means and standard deviations of participant characteristics across all waves.

	2002	2008	2011	2014
	N = 3,724	N = 6, 145	N = 4,121	N = 8,174
Digit symbol	40.77 (14.82)	42.69 (14.20)	44.51 (13.99)	44.21 (13.81)
LS	3.81 (0.78)	3.78 (0.74)	3.86 (0.71)	3.81 (0.73)
PA	3.50 (0.78)	3.53 (0.74)	3.54 (0.52)	3.55 (0.52)
NA	2.02 (0.78)	2.02 (0.74)	2.05 (0.52)	2.09 (0.53)
Age	60.47 (11.78)	61.69 (11.74)	64.83 (10.88)	63.75 (11.43)
Gender	51.3% male	49.9% male	49.9% male	50.1% male
Self-rated health	2.47 (0.84)	2.45 (0.85)	2.49 (0.83)	2.50 (0.82)
Loneliness	1.71 (0.78)	1.75 (0.74)	1.75 (0.52)	1.78 (0.54)
Depression	7.20 (6.78)	6.22 (6.74)	6.51 (6.07)	6.78 (6.13)
Income	2265.17 (2083.78)	2604.12 (2083.74)	2830.31 (2291.99)	2945.24 (2083.01)
Marital status	1.27 (0.84)	1.29 (0.45)	1.28 (0.45)	1.31 (0.46)

LS = life satisfaction. PA = positive affect. NA = negative affect.