[Table] header: Year | Title | US 100 | US AC | Lead singer | Album | Label and cat# row 1 : July 1969 | " Questions 67 and 68 " | 71 | — | Cetera / Lamm | The Chicago Transit Authority | Columbia 44909
row 2 : Oct. 1969 | " Beginnings " | — | — | Lamm | The Chicago Transit Authority | Columbia 45011
row 3 : March 1970 | " Make Me Smile " | 9 | — | Kath | Chicago II | Columbia 45127
row 4 : June 1970 | " 25 or 6 to 4 " | 4 | — | Cetera | Chicago II | Columbia 45194
row 5 : Oct. 1970 | " Does Anybody Really Know What Time It I | 7 | 5 | Lamm | The Chicago Transit Authority | Columbia 45264
row 6 : Feb. 1971 | " Free " | 20 | — | Kath | Chicago III | Columbia 45331
row 7 : April 1971 | " Lowdown " | 35 | — | Cetera | Chicago III | Columbia 45370
row 8 : June 1971 | "Beginnings"/ (A- | 7 | 1 | Lamm | The Chicago Transit Authority | Columbia 45417
row 9 : June 1971 | → "Colour My World" (B | 7 | — | Kath | Chicago II | Columbia 45417
row 10 : Sept. 1971 | "Questions 67 and 68" | 24 | — | Cetera/Lamm | The Chicago Transit Authority | Columbia 45467
row 11 : Sept. 1971 | → / " I'm a | 49 | — | Kath/Cetera/Lamm | The Chicago Transit Authority | Columbia 45467
row 12 : July 1972 | " Saturday in the Park " | 3 | — | Lamm/Cetera | Chicago V | Columbia 45657
row 13 : Oct. 1972 | " Dialogue (Part I & II) | 24 | — | Cetera/Kath | Chicago V | Columbia 45717
row 14 : June 1973 | " Feelin' Stronger Every Day " | 10 | — | Cetera | Chicago VI | Columbia 45880
row 15 : Sept. 1973 | " Just You 'n' Me " | 4 | 7 | Cetera | Chicago VI | Columbia 45933
row 16 : Feb. 1974 | " (I've Been) Searchin | 9 | — | Cetera | Chicago VII | Columbia 46020
row 17 : June 1974 | " Call on Me " | 6 | 1 | Cetera | Chicago VII | Columbia 46062
row 18 : Oct. 1974 | " Wishing You Were Here " | 11 | 1 | Kath/Cetera | Chicago VII | Columbia 10049
row 19 : Feb. 1975 | " Harry Truman " | 13 | — | Lamm | Chicago VIII | Columbia 10092
row 20 : April 1975 | " Old Days " | 5 | 3 | Cetera | Chicago VIII | Columbia 10131
row 21 : Aug. 1975 | " Brand New Love Affair (Part I | 61 | — | Kath/Cetera | Chicago VIII | Columbia 10200
row 22 : June 1976 | " Another Rainy Day in New York City " | 32 | 2 | Cetera | Chicago X | Columbia 10360
row 23 : July 1976 | " If You Leave Me Now " | 1 | 1 | Cetera | Chicago X | Columbia 10390
row 24 : March 1977 | "You Are on My Mind" | 49 | — | Pankow | Chicago X | Columbia 10523
row 25 : Sept. 1977 | " Baby, What a Big Surprise " | 4 | — | Cetera | Chicago XI | Columbia 10620
row 26 : Jan. 1978 | "Little One" | 44 | — | Kath | Chicago XI | Columbia 10683
row 27 : May 1978 | "Take Me Back to Chicago" | 63 | — | Lamm | Chicago XI | Columbia 10737
row 28 : Oct. 1978 | " Alive Again " | 14 | — | Cetera/ Dacus | Hot Streets | Columbia 10845
row 29 : Dec. 1978 | " No Tell Lover " | 14 | 5 | Cetera/Dacus | Hot Streets | Columbia 10879
row 30 : March 1979 | "Gone Long Gone" | 73 | — | Cetera | Hot Streets | Columbia 10935
row 31 : Aug. 1979 | "Must Have Been Crazy" | 83 | — | Dacus | Chicago 13 | Columbia 11061
row 32 : Oct. 1979 | "Street Player"* | — | — | Cetera | Chicago 13 | Columbia 11138
row 33 : July 1980 | "Thunder and Lightning" | 56 | — | Cetera/Lamm | Chicago XIV | Columbia 11345
row 34 : Oct. 1980 | "Song for You" | — | — | Cetera | Chicago XIV | Columbia 11376
row 35 : May 1982 | " Hard to Say I'm Sorry " | 1 | 1 | Cetera | Chicago 16 | Full Moon/Warner 29979
row 36 : Sept. 1982 | " Love Me Tomorrow " | 22 | 8 | Cetera | Chicago 16 | Full Moon/Warner 29911
row 37 : Jan. 1983 | "What You're Missing" | 81 | — | Cetera | Chicago 16 | Full Moon/Warner 29798
row 38 : April 1984 | " Stay the Night " | 16 | — | Cetera | Chicago 17 | Full Moon/Warner 29306
row 39 : July 1984 | " Hard Habit to Break " | 3 | 3 | Cetera/ Champlin | Chicago 17 | Full Moon/Warner 29214
row 40 : Nov. 1984 | " You're the Inspiration " | 3 | 1 | Cetera | Chicago 17 | Full Moon/Warner 29126
row 41 : Feb. 1985 | " Along Comes a Woman "** | 14 | 25 | Cetera | Chicago 17 | Full Moon/Warner 29082
row 42 : Aug. 1986 | "25 or 6 to 4" (Newly | 48 | — | Scheff | Chicago 18 | Full Moon/Warner 28628
row 43 : Oct. 1986 | " Will You Still Love Me? " | 3 | 2 | Scheff/Champlin | Chicago 18 | Full Moon/Warner 28512
row 44 : March 1987 | " If She Would Have Been Faithful... | 17 | 9 | Scheff/Champlin | Chicago 18 | Full Moon/Warner 28424
row 45 : June 1987 | " Niagara Falls " | 91 | — | Scheff | Chicago 18 | Full Moon/Warner 28283
row 46 : May 1988 | " I Don't Wanna Live Without Your | 3 | 5 | Champlin | Chicago 19 | Full Moon/ Reprise 27855
row 47 : Sept. 1988 | " Look Away " | 1 | 1 | Champlin | Chicago 19 | Full Moon/ Reprise 27766
row 48 : Jan. 1989 | " You're Not Alone " | 10 | 9 | Champlin | Chicago 19 | Full Moon/ Reprise 27757
row 49 : April 1989 | " We Can Last Forever " | 55 | 12 | Scheff | Chicago 19 | Full Moon/ Reprise 22985
row 50 : Nov. 1989 | " What Kind of Man Would I Be? " | 5 | 2 | Scheff | Chicago 19 / Greatest Hits 1982-19 | Full Moon/ Reprise 22741
row 51 : July 1990 | "Hearts in Trouble" | 75 | — | Champlin | Days Of Thunder Soundtrack | DGC 19679
row 52 : Jan. 1991 | " Chasin' the Wind " | 39 | 13 | Champlin | Twenty 1 | Reprise 19466
row 53 : Apr. 1991 | "Explain It to My Heart" | — | — | Scheff/Champlin | Twenty 1 | Reprise 19449
row 54 : Aug. 1991 | "You Come to My Senses" | — | 11 | Scheff | Twenty 1 | Reprise 19205
row 55 : June 1995 | "Dream a Little Dream of Me | — | — | Scheff/Jade | Night & Day Big Band | Giant
row 56 : April 1997 | "Here in My Heart" | — | 1 | Champlin/Scheff | The Heart of Chicago 1967–1997 | Reprise
row 57 : Oct. 1997 | "The Only One" | — | 17 | Lamm/Champlin/Schef | The Heart of Chicago 1967–1997 | Reprise
row 58 : June 1998 | "All Roads Lead to You" | — | 14 | Champlin/Lamm/Scheff | The Heart of Chicago 1967–1998 Volume II | Reprise
row 59 : Oct. 1998 | "Show Me a Sign" | — | 28 | Scheff/Champlin | The Heart of Chicago 1967–1998 Volume II | Reprise
row 60 : Sept. 1999 | "Back to You" | — | — | Scheff | Chicago XXVI: Live in Concert | Chicago Records
row 61 : Feb. 2006 | "Feel" | — | 19 | Lamm | Chicago XXX | Rhino
row 62 : May 2006 | "Love Will Come Back" | — | 21 | Scheff/Champlin | Chicago XXX | Rhino
row 63 : June 2008 | "Let's Take a Lifetime | — | — | Scheff | Chicago XXXII Stone of Si | Rhino [/Table] Answer this question based on the above table: What is the US AC of the label and cat# reprise 19466?

Answer: 13.0