22=19,2 - 41=38,2; 42=39,3; 43=40,3; 44=41,3; 45=42,3; 47=43,3; 48=44,3; 49=45,3; 50=46,3; 52=47,3; 53=48,3; 54=49,3; 55=50,3; 56=51,3; 57=52,3; 58=53,4; 59=54,4; 60=55,4; 61=56,4; 62=57,4; 63=58,4; 64=59,4; 65=60,4 von: The journal of finance (ISSN: 0022-1082)