how many teams have used the stadium which hosted the athletics at the 2008 summer olympics – women's high jump ?
SELECT DISTINCT COUNT attr_open var_uri attr_close where brack_open dbr_Athletics_at_the_2008_Summer_Olympics_–_Women's_high_jump dbp_venue var_x sep_dot var_x dbo_tenant var_uri sep_dot var_x a dbo_Stadium brack_close