Robert Simpson

Robert Simpson

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2025

2024

6 months between releases

2023

2 years, 7 months between releases

2021

5 years, 6 months between releases

2015

1 year, 7 months between releases

2014

10 months between releases

2013

11 months between releases

2012

2 years, 7 months between releases

2009

5 years between releases

2004

5 years, 9 months between releases

1998

1 year, 2 months between releases

1997

10 months between releases

1996

9 months between releases
11 months between releases

1995

1994

1 year, 3 months between releases

1993

1992

6 months between releases
7 months between releases

1991

1990

1989

1 year, 6 months between releases

1988

1984