<jupyter_start><jupyter_text>* 2016 has an additional id column called FID, must be dropped* 2014 has an additional id column called FID, must be dropped. Also has AFFGEOID but is not needed because provides same info as FIPS. TRACTCE is part of FIPS, so is not needed.<jupyter_code>data['2010']['data']['E_P_POV']\
    .replace(-999,np.nan)\
    .dropna()\
    .sort_values()
data['2018']['data']['EP_POV']\
    .replace(-999,np.nan)\
    .dropna()\
    .sort_values()
(data['2010']['data']['E_P_PCI']-data['2010']['data']['E_PCI']).sum()
data['2010']['data']['E_PCI']<jupyter_output><empty_output>
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