Bulletin – September 2015 Equation (1)

A v e r a g e l i f e = A v e r a g e s t o c k o f b a n k n o t e s o n i s s u e T o t a l n u m b e r o f b a n k n o t e s d e s t r o y e d MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaqbaeqabiqaaa qaaiaadgeacaWG2bGaamyzaiaadkhacaWGHbGaam4zaiaadwgaaeaa caWGSbGaamyAaiaadAgacaWGLbaaaiabg2da9maalaaabaGaamyqai aadAhacaWGLbGaamOCaiaadggacaWGNbGaamyzaiaaykW7caWGZbGa amiDaiaad+gacaWGJbGaam4AaiaaykW7caWGVbGaamOzaiaaykW7ca WGIbGaamyyaiaad6gacaWGRbGaamOBaiaad+gacaWG0bGaamyzaiaa dohacaaMc8Uaam4Baiaad6gacaaMc8UaamyAaiaadohacaWGZbGaam yDaiaadwgaaeaacaWGubGaam4BaiaadshacaWGHbGaamiBaiaaykW7 caWGUbGaamyDaiaad2gacaWGIbGaamyzaiaadkhacaaMc8Uaam4Bai aadAgacaaMc8UaamOyaiaadggacaWGUbGaam4Aaiaad6gacaWGVbGa amiDaiaadwgacaWGZbGaaGPaVlaadsgacaWGLbGaam4Caiaadshaca WGYbGaam4BaiaadMhacaWGLbGaamizaaaaaaa@8838@