What is the percentage change in the gross deferred tax assets from 2018 to 2019?
{"Deferred tax assets: -- Tax carry forwards": {"June 30, 2019": 231390, "June 24, 2018": 206073}, "Deferred tax assets: -- Allowances and reserves": {"June 30, 2019": 97671, "June 24, 2018": 118559}, "Deferred tax assets: -- Equity-based compensation": {"June 30, 2019": 14661, "June 24, 2018": 16189}, "Deferred tax assets: -- Inventory valuation differences": {"June 30, 2019": 18516, "June 24, 2018": 14021}, "Deferred tax assets: -- Prepaid cost sharing": {"June 30, 2019": 74139, "June 24, 2018": 65644}, "Deferred tax assets: -- Outside basis differences of foreign subsidiaries": {"June 30, 2019": 16260, "June 24, 2018": "\u2014"}, "Deferred tax assets: -- Other": {"June 30, 2019": 17972, "June 24, 2018": 16514}, "Deferred tax assets: -- Gross deferred tax assets": {"June 30, 2019": 470609, "June 24, 2018": 437000}, "Deferred tax assets: -- Valuation allowance": {"June 30, 2019": -226928, "June 24, 2018": -199839}, "Deferred tax assets: -- Net deferred tax assets": {"June 30, 2019": 243681, "June 24, 2018": 237161}, "Deferred tax liabilities: -- Intangible assets": {"June 30, 2019": -9883, "June 24, 2018": -21558}, "Deferred tax liabilities: -- Convertible debt": {"June 30, 2019": -46993, "June 24, 2018": -60252}, "Deferred tax liabilities: -- Capita assets": {"June 30, 2019": -83298, "June 24, 2018": -61429}, "Deferred tax liabilities: -- Amortization of goodwill": {"June 30, 2019": -11299, "June 24, 2018": -10738}, "Deferred tax liabilities: -- Outside basis differences of foreign subsidiaries": {"June 30, 2019": "\u2014", "June 24, 2018": -6656}, "Deferred tax liabilities: -- Other": {"June 30, 2019": -8752, "June 24, 2018": -7955}, "Deferred tax liabilities: -- Gross deferred tax liabilities": {"June 30, 2019": -160225, "June 24, 2018": -168588}, "Deferred tax liabilities: -- Net deferred tax assets": {"June 30, 2019": 83456, "June 24, 2018": 68573}}
gross_deferred_tax_assets_2019 = df["Deferred tax assets: -- Gross deferred tax assets"]["June 30, 2019"]
gross_deferred_tax_assets_2018 = df["Deferred tax assets: -- Gross deferred tax assets"]["June 24, 2018"]
answer = ( gross_deferred_tax_assets_2019 - gross_deferred_tax_assets_2018 ) / gross_deferred_tax_assets_2018 * 100.0