(IP 
  (NP-SBJ 
    (-NONE- *pro*))
                    
  (VP 
    (VV 使)
                    
    (NP-OBJ 
      (DNP 
        (DP 
          (NP 
            (NT １９９７年))
                    
          (DP 
            (DT 全)
                    
            (CLP 
              (M 年))))
                    
        (DEG 的))
                    
      (ADJP 
        (JJ 累积))
                    
      (NP 
        (NN 顺差额)))
                    
    (IP 
      (NP-SBJ 
        (-NONE- *PRO*))
                    
      (VP 
        (VRD 
          (VV 降)
                    
          (VV 到))
                    
        (NP-OBJ 
          (CP 
            (WHNP-2 
              (-NONE- *OP*))
                    
            (CP 
              (IP 
                (NP-SBJ 
                  (-NONE- *T*-2))
                    
                (VP 
                  (VV 微不足道)))
                    
              (DEC 的)))
                    
          (NP 
            (NN 数目)))))))
arg0: 
                    *T*-2