Table 2. Epidemiologic Data and Trends of Anterior Cruciate Ligament Reconstruction in Korean Population.

Variable			2008	2009	2010	2011	2012	2013	2014	2015	2016
Total case			10,248	11,378	12,228	12,698	13,840	14,073	14,285	14,281	14,500
	Sex
		Male	8,543	9,300	9,914	10,231	11,096	11,125	11,439	11,450	11,534
		Female	1,705	2,078	2,314	2,467	2,744	2,948	2,846	2,831	2,966
	Age (yr)
		< 20	1,185	1,332	1,430	1,560	1,916	1,980	2,174	2,235	2,392
		20–29	2,963	3,100	3,302	3,309	3,763	3,791	4,099	4,277	4,416
		30–39	2,775	2,966	3,076	3,016	3,103	3,116	3,082	2,961	2,915
		40–49	2,281	2,582	2,856	2,995	3,032	3,109	2,915	2,840	2,738
		≥ 50	1,044	1,398	1,564	1,818	2,026	2,077	2,015	1,968	2,039
Incidence (per 100,000 person-year)			21.8	24.2	25.5	26.5	28.8	29.3	29.8	28.7	29.1
	Sex
		Male	36.4	39.6	41.6	42.9	46.5	46.7	48.0	46.1	46.4
		Female	7.2	8.8	9.6	10.2	11.4	12.2	11.8	11.4	11.9
	Age (yr)
		< 20	9.8	11.0	12.7	13.9	17.1	17.6	19.4	22.2	24.3
		20–29	40.4	42.3	50.1	50.2	57.1	57.5	62.2	66.7	68.3
		30–39	33.8	36.1	39.5	38.7	39.8	40.0	39.5	40.0	40.1
		40–49	28.4	32.2	34.8	36.5	37.0	37.9	35.5	33.5	32.6
		≥ 50	9.2	12.3	11.0	12.8	14.3	14.7	14.2	11.4	11.4