Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_202_157 ( id number, "affiliation" text, "house members\n2000 election\nresults" number, "house members\nat dissolution" number, "senate members\non election\nday 2000" number, "senate members\nat dissolution" number )

### Question ###
after the dissolution of the 37th parliament of canada how many more house members did the new democratic party have ?

### Accurate SQL ###

SELECT (SELECT "house members\nat dissolution" FROM table_202_157 WHERE "affiliation" = 'new democratic party') - (SELECT "house members\n2000 election\nresults" FROM table_202_157 WHERE "affiliation" = 'new democratic party')