question: Did more Central Pacific El Niños happen in the 1990s or the 2000s?
#1 return Central Pacific El Niños 
#2 return #1 in  the  1990s 
#3 return #1 in  the  2000s 
#4 return number of  #2 
#5 return number of  #3 
#6 return which is more of #4 ,  #5