Table:
text: List of Last of the Summer Wine episodes
Series
Series
Series_Number Number_of_Episodes Original_Air_Date DVD_Region_2_release_date DVD_Region_1_release_date
1 6 1973 2 September 2002 TBA
2 7 1975 2 September 2002 TBA
3 7 1976 26 July 2004 11 March 2008
4 7 1977 26 July 2004 9 September 2008
5 7 1979 5 March 2007 6 September 2009
6 7 1982 5 March 2007 27 April 2010
7 6 1983 3 March 2008 27 April 2010
8 6 1985 3 March 2008 9 July 2010
9 12 1987 5 May 2008* 18 January 2011
10 6 1988 22 September 2008 12 April 2011
11 7 1989 22 September 2008 12 April 2011

text: List of Last of the Summer Wine episodes
Series
Series
Series_Number Number_of_Episodes Original_Air_Date DVD_Region_2_release_date DVD_Region_1_release_date
12 10 1990 26 December 2008 12 July 2011
13 6 1991 26 December 2008 21 February 2012
14 9 1992 26 October 2009 17 April 2012
15 9 1993 26 October 2009 24 July 2012
16 8 1995 27 December 2010 TBA
17 10 1995 27 December 2010 15 June 2004
18 10 1997 7 February 2011 15 January 2013
19 10 1998 7 February 2011 16 April 2013
20 10 1999 26 March 2012 9 July 2013
21 10 2000 26 March 2012 15 October 2013
22 10 2001 23 April 2012 14 January 2014
23 10 2002 23 April 2012 TBA
24 10 2003 TBA TBA

Question: How many series in Last of the Summer Wine originally aired before 1999 with more than 7 episodes and a DVD region 1 release date of April 16, 2013?