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_29708 ( "Conference" text, "Old membership total" real, "New membership total" real, "Net change" text, "Members added" real, "Members lost" real )

### Question ###
What is the smallest number for old membership total?

### Accurate SQL ###

SELECT MIN("Old membership total") FROM table_29708