 print (df)     Country Name  Years  tariff0_0  tariff0_0  tariff0_0 000      Hungary   0000   0.000000   0.000000  00.000000 000      Hungary   0000        NaN   0.000000  00.000000 000      Hungary   0000   0.000000   0.000000  00.000000 000      Hungary   0000   0.000000   0.000000  00.000000 000           eu   0000   0.000000   0.000000  00.000000 000           eu   0000   0.000000   0.000000  00.000000 000           eu   0000   0.000000   0.000000  00.000000  