SIPP 1991 Core Data Files Reference Dates wave srotaton srefmon rhcalmn rhcalyr n 1 1 1 January 1991 9212 1 1 2 February 1991 9212 1 1 3 March 1991 9212 1 1 4 April 1991 9212 1 2 1 October 1990 9469 1 2 2 November 1990 9469 1 2 3 December 1990 9469 1 2 4 January 1991 9469 1 3 1 November 1990 9324 1 3 2 December 1990 9324 1 3 3 January 1991 9324 1 3 4 February 1991 9324 1 4 1 December 1990 9419 1 4 2 January 1991 9419 1 4 3 February 1991 9419 1 4 4 March 1991 9419 2 1 1 May 1991 8699 2 1 2 June 1991 8733 2 1 3 July 1991 8801 2 1 4 August 1991 8890 2 2 1 February 1991 8913 2 2 2 March 1991 8949 2 2 3 April 1991 9001 2 2 4 May 1991 9070 2 3 1 March 1991 8758 2 3 2 April 1991 8786 2 3 3 May 1991 8819 2 3 4 June 1991 8876 2 4 1 April 1991 8845 2 4 2 May 1991 8905 2 4 3 June 1991 8978 2 4 4 July 1991 9047 3 1 1 September 1991 8757 3 1 2 October 1991 8805 3 1 3 November 1991 8806 3 1 4 December 1991 8817 3 2 1 June 1991 8950 3 2 2 July 1991 8965 3 2 3 August 1991 8997 3 2 4 September 1991 9052 3 3 1 July 1991 8770 3 3 2 August 1991 8812 3 3 3 September 1991 8847 3 3 4 October 1991 8869 3 4 1 August 1991 8855 3 4 2 September 1991 8914 3 4 3 October 1991 8951 3 4 4 November 1991 8988 4 1 1 January 1992 8692 4 1 2 February 1992 8705 4 1 3 March 1992 8739 4 1 4 April 1992 8749 4 2 1 October 1991 8829 4 2 2 November 1991 8848 4 2 3 December 1991 8873 4 2 4 January 1992 8881 4 3 1 November 1991 8750 4 3 2 December 1991 8767 4 3 3 January 1992 8802 4 3 4 February 1992 8810 4 4 1 December 1991 8909 4 4 2 January 1992 8933 4 4 3 February 1992 8942 4 4 4 March 1992 8979 5 1 1 May 1992 8553 5 1 2 June 1992 8588 5 1 3 July 1992 8597 5 1 4 August 1992 8644 5 2 1 February 1992 8767 5 2 2 March 1992 8762 5 2 3 April 1992 8772 5 2 4 May 1992 8816 5 3 1 March 1992 8622 5 3 2 April 1992 8653 5 3 3 May 1992 8666 5 3 4 June 1992 8687 5 4 1 April 1992 8831 5 4 2 May 1992 8859 5 4 3 June 1992 8872 5 4 4 July 1992 8884 6 1 1 September 1992 8552 6 1 2 October 1992 8591 6 1 3 November 1992 8623 6 1 4 December 1992 8645 6 2 1 June 1992 8755 6 2 2 July 1992 8785 6 2 3 August 1992 8809 6 2 4 September 1992 8827 6 3 1 July 1992 8662 6 3 2 August 1992 8677 6 3 3 September 1992 8723 6 3 4 October 1992 8763 6 4 1 August 1992 8834 6 4 2 September 1992 8852 6 4 3 October 1992 8851 6 4 4 November 1992 8875 7 1 1 January 1993 8531 7 1 2 February 1993 8532 7 1 3 March 1993 8536 7 1 4 April 1993 8549 7 2 1 October 1992 8781 7 2 2 November 1992 8817 7 2 3 December 1992 8813 7 2 4 January 1993 8836 7 3 1 November 1992 8678 7 3 2 December 1992 8682 7 3 3 January 1993 8702 7 3 4 February 1993 8730 7 4 1 December 1992 8769 7 4 2 January 1993 8784 7 4 3 February 1993 8803 7 4 4 March 1993 8837 8 1 1 May 1993 8565 8 1 2 June 1993 8571 8 1 3 July 1993 8553 8 1 4 August 1993 8557 8 2 1 February 1993 8801 8 2 2 March 1993 8803 8 2 3 April 1993 8826 8 2 4 May 1993 8825 8 3 1 March 1993 8711 8 3 2 April 1993 8698 8 3 3 May 1993 8701 8 3 4 June 1993 8688 8 4 1 April 1993 8812 8 4 2 May 1993 8814 8 4 3 June 1993 8836 8 4 4 July 1993 8848