What was the change in the the Total deferred tax assets between 2018 and 2019?
{"Deferred tax assets: -- Investment in partnership": {"2019": 358024, "2018": 299466}, "Deferred tax assets: -- Net operating loss carryforwards and tax credits": {"2019": 5160, "2018": 5634}, "Deferred tax assets: -- Other": {"2019": 1657, "2018": 1879}, "Deferred tax assets: -- Total": {"2019": 364841, "2018": 306979}, "Deferred tax assets: -- Valuation allowance": {"2019": "\u2014", "2018": "\u2014"}, "Deferred tax assets: -- Total deferred tax assets": {"2019": 364841, "2018": 306979}, "Deferred tax assets: -- Total deferred tax liabilities": {"2019": "\u2014", "2018": "\u2014"}, "Deferred tax assets: -- Deferred tax assets, net": {"2019": 364841, "2018": 306979}}
deferred_tax_assets_total_2019 = df["Deferred tax assets: -- Total"]["2019"]
deferred_tax_assets_total_2018 = df["Deferred tax assets: -- Total"]["2018"]
answer = deferred_tax_assets_total_2019 - deferred_tax_assets_total_2018