["1992-01-01\tN/A\tppt\t0\t", "1992-02-01\tN/A\tppt\t0\t", "1992-03-01\tN/A\tppt\t0\t", "1992-04-01\tN/A\tppt\t0\t", "1992-05-01\tN/A\tppt\t0\t", "1992-06-01\tN/A\tppt\t0\t", "1992-07-01\tN/A\tppt\t0\t", "1992-08-01\tN/A\tppt\t0\t", "1992-09-01\tN/A\tppt\t0\t", "1992-10-01\tN/A\tppt\t0\t", "1992-11-01\tN/A\tppt\t0\t", "1992-12-01\tN/A\tppt\t0\t"]