| Covers listed |
|
| 1948: | 26 February, |
| 1949: | 21 April, |
| 1952: | 17 January, |
| 1953: | 29 January, 30 July, 24 September, 12 November, 3 December, |
| 1954: | 11 February, 11 March, 24 March, 27 May, 2 December, |
| 1955: | 20 January, 24 February, 13 October, 1 December, |
| 1956: | 23 February, 1 March, 11 October, |
| 1957: | 18 April, 2 May, 23 May, 30 June, 7 November, |
| 1958: | 25 September, 9 October, |
| 1959: | 10 September, 17 September, |
| 1960: | 14 January, 19 May, 1 September, 8 September, 13 October, 20 October, 24 November, |
| 1961: | 12 January, 9 March, 3 August, 12 October, |
| 1962: | 12 April, 17 May, 31 May, 14 June, 28 June, 12 July, 26 July, 2 August, 8 November, 20 December, |
| 1963: | 28 March, 13 June, 20 June, 12 September, 19 September, 21 November, 5 December, 12 December, |
| 1964: | 16 January, 23 January, 6 February, 25 March, 2 April, 9 April, 7 May, 14 May, 21 May, 2 July, 6 August, 13 August, 17 September, 1 October, 12 November, 19 November, 26 November, 24 December, |
| 1965: | 28 January, 8 April, 22 April, 22 July, 16 September, 4 November, 16 December, |
| 1966: | 6 January, 10 February, 24 March, 31 March, 30 June, 28 July, 4 August, 11 August, 1 September, 29 September, |
| 1967: | 9 February, 2 March, 16 March, 13 July, 10 August, 31 August, 21 September, 28 September, 5 October, 26 October, 2 November, 9 November, 21 December, |
| 1968: | 11 January, 15 February, 14 March, 21 March, 28 March, 4 April, 25 April, 30 May, 25 July, 15 August, 24 October, |
| 1969: | 2 January, 13 March, 20 March, 10 April, 29 May, 3 July, 21 August, 2 October, |
| 1970: | 9 April, 14 May, 4 June, 27 August, |
| 1971: | 12 August, 16 September, 30 September, 21 October, 2 December, |
| 1972: | 6 April, 4 May, 31 August, |
| 1973: | 11 January, 6 September, 18 October, 25 October, 8 November, 15 November, 29 November, 13 December, 27 December, |
| 1974: | 8 August, 21 November, |
| 1977: | 24 March, |
| 1978: | 9 February, 31 August, |
| 1979: | 13 September, |
| 1980: | 10 April, 22 May, 2 October, |
| 1981: | 18 June, |
| 1983: | 21 April, 9 June, |
| 1985: | 30 May, |
| 1990: | 20 January, |
| 1991: | 13 April, 24 August, |
