请问下IMF上各国CPI数据是定基数据还是环比数据？

以下是2009年1月到2015年12月，我国CPI的数据
请问下，如果这个数据是定基数据的话，那基期是哪一年呢？

97.22160436
97.25869313
96.97445165
96.79498917
96.33037179
96.01600111
95.97212372
96.37082516
96.78663043
96.6955079
97.04000736
97.91406593
98.67992843
99.88467784
99.30183849
99.50524886
99.31661332
98.80046513
99.13920379
99.74380404
100.2709491
100.9501103
101.9890477
102.418113
103.5152449
104.7790271
104.6641378
104.7790271
104.7790271
105.1236949
105.583252
105.9279199
106.387477
106.5023663
106.2725877
106.6172556
108.2257056
108.1108163
108.3405949
108.2257056
107.8810377
107.3065913
107.4214806
108.1108163
108.4554841
108.3405949
108.5703734
109.3745984
110.408602
111.6723841
110.6383805
110.8681591
110.1788234
110.1788234
110.2937127
110.8681591
111.7872734
111.7872734
111.7872734
112.0170519
113.2808341
113.8552805
113.2808341
112.8212769
112.9361662
112.8212769
112.8212769
113.0510555
113.6255019
113.6255019
113.2808341
113.7403912
114.0850591
115.4637305
114.7743948
114.5446162
114.3148376
114.3148376
114.7743948
115.3488412
115.4637305
115.0041733
115.0041733
115.5786198