Table 7.

Frequency distribution of patients with lumbar disc herniation according to age group in 2008, 2012, and 2016

Age Group	2008	2012	2016
0–9	0.01	0.01	0.01
10–19	1.37	1.34	1.07
20–29	7.18	6.34	5.78
30–39	12.61	12.84	11.54
40–49	20.68	18.35	16.61
50–59	22.16	24.34	23.44
60–69	19.98	17.86	19.84
70–79	13.04	14.70	15.48
≥80	2.97	4.22	6.23