用Frontier算企业创新效率时候，方程是 ，X变量有两个，我黏贴进数据文件的格式是这样的：
1 1 7.007984947 8.320812156 3.433987204
2 1 11.00623662 8.831039694 2.995732274
3 1 14.92506717 12.71383935 6.192362489
4 1 15.66296115 12.63002832 6.605297921
5 1 13.23554583 10.57783058 4.8978398
6 1 10.50395926 10.62304841 6.073044534
7 1 12.21093287 10.46541096 5.062595033
8 1 13.0799515 10.68193875 4.324132656
9 1 6.28666689 7.606007116 2.890371758
10 1 11.44779994 9.264526102 2.995732274
11 1 16.31378305 13.94448694 7.831220215
12 1 11.1879124 8.483256345 3.449987546
13 1 13.88493732 11.73804046 5.303304908
14 1 12.11425584 9.72952401 4.369447852
15 1 12.8872239 10.35078131 5.791488055
16 1 9.159208676 7.933859239 2.944438979
17 1 8.664977693 7.905960833 3.258096538
18 1 12.48134435 10.53836787 4.310799125
19 1 8.374879378 8.957328349 4.051784948
20 1 10.82190499 9.295080321 3.701301974
21 1 12.64143106 10.60937311 5.519458915
22 1 9.268203644 10.10280812 5.384495063
23 1 11.13453673 11.39993899 6.068425588
24 1 12.65881583 10.76700785 5.030437921
25 1 10.133811 8.916154768 3.725693427
26 1 10.97705319 8.610547426 3.749504076
27 1 9.211465634 10.7178011 3.526360525
28 1 14.47800911 11.01373439 5.499215309
29 1 13.86332057 10.7150999 4.919980926
30 1 10.74251914 8.137593336 3.401197382
31 1 11.61991004 8.882632076 3.555348061
32 1 11.43114464 11.68293165 5.966146739
33 1 10.82969821 8.585435184 4.49980967
第一列是公司ID，第二列是1个时期，后面三个是Y和X1、X2，那时间t怎么弄，已经反映到黏贴的数据中了吗？