Average number years you own a bike

[Desert viper_imp]

Of the bikes that I still own:
1985 YAMAHA RZ350..........30 years 2014 HONDA CB1100 DELUXE..4 years
1998 ATK 605 ES................22 years 2016 BMW R1200R.................4 years
1999 KAWASAKI ZRX 1100...21 years 2019 KAWASAKI Z900RS.........4 mo.
1999 KAWASAKI ZRX1100...19 years
2006 DUCATI S2R 1000.......14 years
2009 H-D ROAD KING..........9 years