Changes

 {| class="wikitable" style="float:left"|- style="text-align:center;"| Year|-| Month|-| Engine 1|-| Engine 2|-|}<div style = "width: 10090%; overflow: scroll;" >

| || colspan ="12" | 1965 || colspan ="12" | 1966 || colspan ="12" | 1967 || colspan ="12" | 1968 || colspan ="12" | 1969 || colspan ="12" | 1970|-||Jan||Feb||Mar||Apr||May||Jun||Jul||Aug||Sep||Oct||Nov||Dec||Jan||Feb||Mar||Apr||May||Jun||Jul||Aug||Sep||Oct||Nov||Dec||Jan||Feb||Mar||Apr||May||Jun||Jul||Aug||Sep||Oct||Nov||Dec||Jan||Feb||Mar||Apr||May||Jun||Jul||Aug||Sep||Oct||Nov||Dec||Jan||Feb||Mar||Apr||May||Jun||Jul||Aug||Sep||Oct||Nov||Dec||Jan||Feb||Mar||Apr||May||Jun||Jul||Aug||Sep||Oct||Nov||Dec

| colspan ="6" ; style="color:green; background-color:green;" |0 |Jan|colspan ="1" style="background-color:red;" |Feb||Mar||Apr||May||Jun||Jul||Aug||Sep||Oct||Nov||Dec||Jan||Feb||Mar||Apr||May||Jun||Jul||Aug||Sep||Oct||Nov||Dec||Jan||Feb||Mar||Apr||May||Jun||Jul||Aug||Sep||Oct||Nov||Dec||Jan||Feb||Mar||Apr||May||Jun||Jul||Aug||Sep||Oct||Nov||Dec||Jan||Feb||Mar||Apr||May||Jun||Jul||Aug||Sep||Oct||Nov||Dec||Jan||Feb||Mar||Apr||May||Jun||Jul||Aug||Sep||Octcolspan ="5" style="background-color:yellow;" | |Nov|colspan ="60" ; style="background-color:green;" |Dec

|9999 || colspan ="616" ; style="color:green; background-color:green;" | 0 || colspan ="111" style="background-color:red;" | || colspan ="515" style="background-color:greenyellow;" | || colspan ="6030" ; style="background-color:green;" |