SIPP 1990 Core Data Files Reference Dates wave srotaton srefmon rhcalmn rhcalyr n 1 1 1 January 1990 14591 1 1 2 February 1990 14591 1 1 3 March 1990 14591 1 1 4 April 1990 14591 1 2 1 October 1989 14445 1 2 2 November 1989 14445 1 2 3 December 1989 14445 1 2 4 January 1990 14445 1 3 1 November 1989 14681 1 3 2 December 1989 14681 1 3 3 January 1990 14681 1 3 4 February 1990 14681 1 4 1 December 1989 14432 1 4 2 January 1990 14432 1 4 3 February 1990 14432 1 4 4 March 1990 14432 2 1 1 May 1990 13877 2 1 2 June 1990 13943 2 1 3 July 1990 14002 2 1 4 August 1990 14174 2 2 1 February 1990 13756 2 2 2 March 1990 13812 2 2 3 April 1990 13901 2 2 4 May 1990 13993 2 3 1 March 1990 13812 2 3 2 April 1990 13890 2 3 3 May 1990 13945 2 3 4 June 1990 14101 2 4 1 April 1990 13707 2 4 2 May 1990 13767 2 4 3 June 1990 13859 2 4 4 July 1990 13971 3 1 1 September 1990 14067 3 1 2 October 1990 14100 3 1 3 November 1990 14133 3 1 4 December 1990 14162 3 2 1 June 1990 13805 3 2 2 July 1990 13856 3 2 3 August 1990 13923 3 2 4 September 1990 14031 3 3 1 July 1990 14016 3 3 2 August 1990 14054 3 3 3 September 1990 14129 3 3 4 October 1990 14214 3 4 1 August 1990 13687 3 4 2 September 1990 13738 3 4 3 October 1990 13808 3 4 4 November 1990 13869 4 1 1 January 1991 13886 4 1 2 February 1991 13912 4 1 3 March 1991 13961 4 1 4 April 1991 13993 4 2 1 October 1990 13847 4 2 2 November 1990 13884 4 2 3 December 1990 13910 4 2 4 January 1991 13934 4 3 1 November 1990 13890 4 3 2 December 1990 13930 4 3 3 January 1991 13968 4 3 4 February 1991 13977 4 4 1 December 1990 13667 4 4 2 January 1991 13700 4 4 3 February 1991 13735 4 4 4 March 1991 13803 5 1 1 May 1991 13695 5 1 2 June 1991 13708 5 1 3 July 1991 13737 5 1 4 August 1991 13792 5 2 1 February 1991 13605 5 2 2 March 1991 13630 5 2 3 April 1991 13645 5 2 4 May 1991 13675 5 3 1 March 1991 13673 5 3 2 April 1991 13715 5 3 3 May 1991 13722 5 3 4 June 1991 13773 5 4 1 April 1991 13542 5 4 2 May 1991 13585 5 4 3 June 1991 13547 5 4 4 July 1991 13565 6 1 1 September 1991 13608 6 1 2 October 1991 13646 6 1 3 November 1991 13670 6 1 4 December 1991 13719 6 2 1 June 1991 13506 6 2 2 July 1991 13541 6 2 3 August 1991 13587 6 2 4 September 1991 13648 6 3 1 July 1991 13486 6 3 2 August 1991 13531 6 3 3 September 1991 13539 6 3 4 October 1991 13600 6 4 1 August 1991 13288 6 4 2 September 1991 13336 6 4 3 October 1991 13378 6 4 4 November 1991 13416 7 1 1 January 1992 13608 7 1 2 February 1992 13625 7 1 3 March 1992 13657 7 1 4 April 1992 13668 7 2 1 October 1991 13459 7 2 2 November 1991 13480 7 2 3 December 1991 13526 7 2 4 January 1992 13552 7 3 1 November 1991 13570 7 3 2 December 1991 13589 7 3 3 January 1992 13600 7 3 4 February 1992 13623 7 4 1 December 1991 13385 7 4 2 January 1992 13399 7 4 3 February 1992 13412 7 4 4 March 1992 13451 8 1 1 May 1992 13604 8 1 2 June 1992 13655 8 1 3 July 1992 13638 8 1 4 August 1992 13677 8 2 1 February 1992 13591 8 2 2 March 1992 13573 8 2 3 April 1992 13585 8 2 4 May 1992 13592 8 3 1 March 1992 13542 8 3 2 April 1992 13559 8 3 3 May 1992 13565 8 3 4 June 1992 13590 8 4 1 April 1992 13378 8 4 2 May 1992 13404 8 4 3 June 1992 13379 8 4 4 July 1992 13394