1999

January	—	—	—	—	—
—	—	—	—	—	—

1998

January	February	March	April	May	June
July	—	September	October	—	—

1997

—	February	March	April	May	June
July	August	September	October	November	December

1996

January	February	March	April	May	June
July	August	September	—	November	—

1995

January	—	March	—	—	—
July	August	—	—	—	December

1994

January	February	March	April	May	—
July	—	—	—	—	—

1993

January	February	March	April	May	June
—	—	—	—	—	—

1992

January	February	—	April	—	—
—	August	September	October	—	December

1991

January	February	—	—	—	—
July	—	September	October	November	December

1990

January	February	March	April	May	June
July	—	—	—	—	December