如何选择以下数据中2003年的数据？怎么编程？不知道where year=2003怎么加进去 求大神指导~~~~~~~
data case;
input year ROEt ATO PM LEV GROWTH PB ARR INV ASSET ROE;
cards;
2002  0.296  0.389  0.215  4.384  0.197   8.048  0.637  0.248 20.873  0.181
2002  0.665  0.335  0.407  2.273 -0.084   2.154 -1.217  0.030 21.062  0.899
2002 -0.045  0.963  0.084 -5.339  4.155 -12.879 -0.598  0.096 21.474  1.504
2003 -0.173  0.635  0.389  2.670 -2.024  12.735 -1.368  0.074 18.997  0.446
2003  0.956  0.882 -0.051  3.223  1.331   8.052  1.009  0.194 21.347  0.730
2003  0.591  0.284  0.383 -6.063  1.831 -10.600 -0.029 -0.065 21.680  0.594