I found another list. This one comes from 1975 and it reflects the 1050 CHUM Top 100. If you wondered when the disco era started...

CHUM 1975 Top 100:

1. Love Will Keep Us Together - Captain and Tennille
2. Lucy in the Sky with Diamonds - Elton John
3. Jive Talkin' - The Bee Gees
4. Mandy - Barry Manilow
5. Lady Marmalade - Labelle
6. Someone Saved My Life Tonight - Elton John
7. Kung Fu Fighting - Carl Douglas
8. Calypso/I'm Sorry - John Denver
9. Get Down Tonight - KC and the Sunshine Band
10. Have You Never Been Mellow - Olivia Newton John
11. Fame - David Bowie
12. My Eyes Adored You - Frankie Valli
13. Philadelphia Freedom - Elton John
14. Best of My Love - The Eagles
15. Rinestone Cowbiy - Glen Campbell
16. Ballroom Blitz - Sweet
17. He Don't Love You - Tony Orlando and Dawn
18. Pinball Wizard - Elton John
19. Bad Blood - Neil Sedaka
20. Do the Hustle - Van McCoy
21. Thank God I'm a Country Boy - John Denver
22. How Sweet it Is - James Taylor
23. Wildfire - Mike Murphy
24. You're a One Man Woman - Paul Anka and Otia Coates
25. Doctor's Orders - Carol Douglas
26. Listen To What the Man Said - Paul McCartney and the Wings
27. Fallin' In Love - Hamilton Joe Frank and Reynolds
28. It's a Miracle - Barry Manilow
29. I'm Not In Love - 10CC
30. Somebody Done Somebody Wrong Song - BJ Thomas
31. Island Girl - Elton John
32. Hey You - Bachman Turner Overdrive
33. Angie Baby - Helen Reddy
34. Old Days - Chicago
35. Jackie Blue - Ozark Mountain Daredevils
36. Some Kind of Wonderful - Grand Funk Railroad
37. Don't Call Us We'll Call You - Sugar Loaf
38. Never Can Say Goodbye - Gloria Gaynor
39. Take Me in Your Arms - Doobie Brothers
40. Mr. Postman - The Carpenters
41. Lyin' Eyes - The Eagles
42. Laughter In the Rain - Neil Sedaka
43. That's the Way I Like It - KC and the Sunshine Band
44. When Will I Be Loved - Linda Ronstadt
45. Melody of Love - Bobby Vinton
46. Shame On You - Shirley Goodman and Co.
47. Nights on Broadway - The Bee Gees
48. At Seventeen - Janis Ian
49. Games People Play - The Spinners
50. You're the First the Last My Everything - Barry White
51. Boogie On Reggae Woman - Stevie Wonder
52. Junior's Farm - Paul McCartney and the Wings
53. Miracles - Jefferson Starship
54. I Can Help - Billy Swan
55. Homecoming - Hagood Hardy
56. Cat's In The Cradle - Harry Chapin
57. Rocky - Austin Roberts
58. One Of These Nights - The Eagles
59. Midnight Blue - Melissa Manchester
60. How Long Has This Been Going On - Ace
61. Sister Golden Hair - America
62. Only Women Bleed - Alice Cooper
63. Let It roll Down the Highway - Bachman Turner Overdrive
64. Rockin' Chair - Gwen McCrea
65. Pick Up the Pieces - Average White Band
66. It's Magic - Pilot
67. I Don't Like to Sleep Alone - Paul Anka
68. I'm Not Lisa - Jessi Colter
69. Heat Wave - Lind Ronstadt
70. Dance With Me - Orleans
71. Black Superman - Johnny Wakelin
72. Quick Change Artist - Bachman Turner Overdrive
73. Third Rate Romance - Amazing Rhythm Aces
74. Lovin' You - Minnie Riperton
75. Why Can't We Be Friends - War
76. Fire - Ohio Players
77. Blackwater - Doobie Brothers
78. No No Song - Ringo Starr
79. Bad Time For Being In Love - Grand Funk Railroad
80. Nothing Stronger Than Our Love - Paul Anka
81. You're No Good - Linda Ronstadt
82. New Orleans - The Stampeders
83. Who Loves You Pretty Baby - The Four Seasons
84. Do It (Til You're Satisfied) - BT Express
85. Only Have Eyes For You - Art Garfunkle
86. Don't Know What the Hell I Got - Michel Pagliaro
87. Please Mister Please - Olivia Newton John
88. Chevy Van - Sammy John
89. Swearing' To God - Frankie Valli
90. Ain't No Way to Treat a Lady - Helen Reddy
91. Only Yesterday - The Carpenters
92. You Are So Beautiful - Joe Cocker
93. Take Me in Your Arms - Charity Brown
94. Brazil - Ritchie Family
95. Lady Blue - Leon Russell
96. Hit The Road Jack - The Stampeders
97. Rockford Files - Mike Post
98. Bungle in the Jungle - Jethro Tull
99. Wait For No Man - Fludd
100. Dynomite - Bazuka