Year	Month	yt	st
1992	Mar	9.9	9.7
1992	Jun	9.5	8.6
1992	Sep	8.3	7.4
1992	Dec	8.7	7.83
1993	Mar	9.9	9.7
1993	Jun	8.8	8.6
1993	Sep	7.0	7.4
1993	Dec	7.9	7.83
1994	Mar	9.3	9.7
1994	Jun	7.5	8.6
1994	Sep	6.9	7.4
1994	Dec	6.9	7.83