The singles chart started as a top 10 chart in week 42 of 1958 and was expanded to a top 20 chart in week 5 of 1995 , the same time the albums chart , which started as a top 20 chart in week 1 of 1967 was expanded to a top 40 chart .
The singles chart started as a top 10 chart in week 42 , 1958 and was expanded to a top 20 chart in week 5 , 1995 .