-----------
89nov
89dec
90jan
90feb
90mar
-----------
90apr
90may
90jun
90jul
90sept
-----------
90oct
90nov
90dec
---------
91jan
91feb
91mar
91may
91jun
--------
91jul
91sept
91oct
91nov
91dec
-----------
92jan
92feb
92mar
92apr
92may
----------
92jun
92jul
92sept
92oct
92nov
---------
93jan
93feb
93mar
93apr
93may
---------
93jun
93jul
93sept
93oct
93nov
93dec*
---------
94jan
94mar
94apr
94may
94jun
---------
94jul
94sept
94oct
94nov
94dec
---------
95jan
95feb
95mar
95apr
95may
---------
95jun
95jul
95oct
95nov
95dec
---------
96jan
96feb
96mar
96nov
96dec
---------
97mar
---------
98mar
98jun
----------
99sept_oct
----------
oosept_oct