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| Year (Years ended March 31) | Total CO2 Emissions (thousands of tons) | CO2 Emission Reduction Ratios Per Transport t-km Compared with FY March 1991 Levels (%) |
|---|---|---|
| 1991 | 177.8 | 100.0 |
| 2010 | 72.1 | 69.9 |
| 2011 | 70.0 | 69.1 |
| 2012 | 66.3 | 68.3 |
| 2013 | 66.9 | 66.6 |
| 2014 | 71.2 | 64.5 |