Table 2.

Incidence of knee arthroscopy (per 10⁵ person-years) and mean age of patients for osteoarthritis, degenerative meniscal tear, and traumatic meniscal tear (debridement and repair) in Finland from 1997 to 2012

Year	Osteoarthritis		Degenerative meniscus		Traumatic meniscus (debridement)		Traumatic meniscus (repair)
	Incidence	Mean age	Incidence	Mean age	Incidence	Mean age	Incidence	Mean age
1997	214	52	134	49	63	42	1.2	44
1998	222	53	136	50	64	42	1.4	40
1999	235	53	139	50	63	43	1.9	39
2000	244	53	154	51	65	43	2.0	43
2001	218	54	142	51	64	43	1.8	37
2002	240	54	153	51	65	43	1.9	38
2003	221	54	144	52	71	44	1.6	39
2004	208	54	140	52	76	44	1.7	41
2005	225	54	151	52	90	45	1.9	39
2006	233	55	164	53	87	45	2.0	39
2007	224	55	167	53	95	45	1.9	42
2008	210	55	163	53	91	45	1.3	38
2009	187	55	155	53	85	45	1.5	40
2010	155	54	138	52	92	46	1.7	38
2011	145	54	138	53	101	46	2.2	37
2012	124	54	125	52	97	46	2.1	40