Table 3.

The decoupling index, score, and grades.

	${\Delta \mathrm{F}}^{\mathrm{t}}$	${\Delta \text{GDP}}^{\mathrm{t}}$	${\mathrm{D}}^{\mathrm{t}}$	Decoupling status
1	<0	>0	${\mathrm{D}}^{\mathrm{t}}$ < 0	SD (Strong decoupling)
2	>0	>0	0.8 ≥ ${\mathrm{D}}^{\mathrm{t}}$ > 0	WD (Weak decoupling)
3	<0	<0	1.2 ≥ ${\mathrm{D}}^{\mathrm{t}}$ > 0.8	RC (Recessive coupling)
4	>0	>0	${\mathrm{D}}^{\mathrm{t}}$ > 1.2	END (Expansive negative decoupling)
5	>0	<0	${\mathrm{D}}^{\mathrm{t}}$ < 0	SND (Strong negative decoupling)
6	<0	<0	0.8 ≥ ${\mathrm{D}}^{\mathrm{t}}$ > 0	WND (Weak negative decoupling)
7	>0	>0	1.2 ≥ ${\mathrm{D}}^{\mathrm{t}}$ > 0.8	EC (Expansive decoupling)
8	<0	<0	${\mathrm{D}}^{\mathrm{t}}>1.2$	RD (Recessive decoupling)