New this year (106)
15%
1 year (71)
10%
2 or 3 years (180)
25%
4 or 5 years (143)
20%
6 to 10 years (124)
17%
11 to 15 years (51)
7%
older than 15 years (43)
6%
I don't even remember when or where mine came from (8)
1%