<Tr> <Td> Dave Argall </Td> <Td> Policy Committee Chairman </Td> <Td> Lisa Boscola </Td> </Tr> <Tr> <Td> Chuck McIlhinney </Td> <Td> Caucus Administrator </Td> <Td> John Blake </Td> </Tr> <Table> <Tr> <Th> Affiliation </Th> <Th_colspan="2"> Party (Shading indicates majority caucus) </Th> <Th> Total </Th> <Th> </Th> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Th> Republican </Th> <Th> Democratic </Th> <Th> Vacant </Th> </Tr> <Tr> <Th> 1995 - 1996 Session </Th> <Td> 29 </Td> <Td> 21 </Td> <Th> 50 </Th> <Td> 0 </Td> </Tr> <Tr> <Th> 1997 - 1998 Session </Th> <Td> 30 </Td> <Td> 20 </Td> <Th> 50 </Th> <Td> 0 </Td> </Tr> <Tr> <Th> 1999 - 2000 Session </Th> <Td> 30 </Td> <Td> 20 </Td> <Th> 50 </Th> <Td> 0 </Td> </Tr> <Tr> <Th> 2001 - 2002 Session </Th> <Td> 30 </Td> <Td> 20 </Td> <Th> 50 </Th> <Td> 0 </Td> </Tr> <Tr> <Th> 2003 - 2004 Session </Th> <Td> 29 </Td> <Td> 21 </Td> <Th> 50 </Th> <Td> 0 </Td> </Tr> <Tr> <Th> 2005 - 2006 Session </Th> <Td> 30 </Td> <Td> 20 </Td> <Th> 50 </Th> <Td> 0 </Td> </Tr> <Tr> <Th> 2007 - 2008 Session </Th> <Td> 29 </Td> <Td> 21 </Td> <Th> 50 </Th> <Td> 0 </Td> </Tr> <Tr> <Th> 2009 - 2010 Session </Th> <Td> 30 </Td> <Td> 20 </Td> <Th> 50 </Th> <Td> 0 </Td> </Tr> <Tr> <Th> 2011 - 2012 Session </Th> <Td> 30 </Td> <Td> 20 </Td> <Th> 50 </Th> <Td> 0 </Td> </Tr> <Tr> <Th> 2013 - 2014 Session </Th> <Td> 27 </Td> <Td> 23 </Td> <Th> 50 </Th> <Td> 0 </Td> </Tr> <Tr> <Th> 2015 - 2016 Session </Th> <Td> 30 </Td> <Td> 20 </Td> <Th> 50 </Th> <Td> 0 </Td> </Tr> <Tr> <Th> End of session, 2016 </Th> <Td> 31 </Td> <Td> 19 </Td> <Th> 50 </Th> <Td> 0 </Td> </Tr> <Tr> <Td_colspan="5"> </Td> </Tr> <Tr> <Th> 2017 - 2018 Session </Th> <Td> 34 </Td> <Td> 16 </Td> <Th> 50 </Th> <Td> 0 </Td> </Tr> <Tr> <Th> Latest voting share </Th> <Th> 7001680000000000000 ♠ 68% </Th> <Th> 7001320000000000000 ♠ 32% </Th> <Th_colspan="2"> </Th> </Tr> </Table> <Tr> <Th> Affiliation </Th> <Th_colspan="2"> Party (Shading indicates majority caucus) </Th> <Th> Total </Th> <Th> </Th> </Tr>

How many senators are in the pa senate