Table:
text: Carvill Hurricane Index
Data
Table 1: Historical storms and the CHI (1998 to 2005)
Name_ Year_ Landfall NHC_Advisory_Number Vmph Rmiles Saffir_Simpson_Category CHI
Bonnie 1998 North Carolina 31B 115 115 3 10.7
Earl 1998 Florida 11 80 115 1 4.6
Georges 1998 Mississippi 51B 105 45 2 5.1
Bret 1999 Texas 17 140 40 4 10.4
Floyd 1999 North Carolina 34A 110 115 2 9.6
Irene 1999 Florida 9 75 30 1 1.8
Lili 2002 Louisiana 48A 100 60 2 5.2
Claudette 2003 Texas 27A 75 30 1 1.8
Isabel 2003 North Carolina 49A 100 115 2 7.7
Charley 2004 Florida 18 145 30 4 10.4
Frances 2004 Florida 44A 105 75 2 6.6
Ivan 2004 Alabama 55B 130 105 3 13.5

text: Carvill Hurricane Index
Data
Table 1: Historical storms and the CHI (1998 to 2005)
Name_ Year_ Landfall NHC_Advisory_Number Vmph Rmiles Saffir_Simpson_Category CHI
Jeanne 2004 Florida 49B 115 70 3 8.0
Dennis 2005 Florida 25B 120 40 3 6.9
Katrina 2005 Florida 9 75 15 1 1.4
Katrina 2005 Louisiana 26A 145 120 4 19.0
Rita 2005 Texas 26B 120 85 3 9.9

Question: What is the maximum number for the Saffir-Simpson category in the Carvill Hurricane Index?