Table 1.

Percentage of patients undergoing each procedure type

Procedure	Number of patients	Percent of patients
Anterior cervical discectomy and fusion	18,464	21
Anterior lumbar fusion	3324	4
Cervical laminectomy	2782	3
Cervical laminotomy	1701	2
Cervical corpectomy	1828	2
Lumbar laminectomy	17,545	20
Lumbar laminotomy	24,359	28
Posterior lumbar fusion	15,552	18
Posterior cervical fusion	1535	2
Thoracic fusion	712	1
Thoracic laminectomy	669	1

Total number of patients = 88,471.