As of December 31, 2021, we recorded a valuation allowance of $9.07 billion for the portion of the deferred tax asset that we do not expect to be realized. The valuation allowance on our net deferred taxes increased by $6.14 billion, $974 million, and $150 million during the years ended December 31, 2021, 2020 and 2019, respectively. The changes in valuation allowance are primarily due to additional U.S. deferred tax assets and liabilities incurred in the respective year. We have $417 million of deferred tax assets in foreign jurisdictions, which management believes are more-likely-than-not to be fully realized given the expectation of future earnings in these jurisdictions. We did not have any material releases of valuation allowance for the years ended December 31, 2021, 2020 and 2019. We continue to monitor the realizability of the U.S. deferred tax assets taking into account multiple factors. In completing this assessment, we considered both objective and subjective factors. These factors included, but were not limited to, a history of losses in prior years, excess tax benefits related to stock-based compensation, future reversal of existing temporary differences and tax planning strategies. After evaluating all available evidence, we intend to continue maintaining a full valuation allowance on our U.S. deferred tax assets until there is sufficient evidence to support the reversal of all or some portion of these allowances. Given the improvement in our operating results and depending on the amount of stock-based compensation tax deductions available in the future, we may release the valuation allowance associated with the U.S. deferred tax assets in the next few years. Release of all, or a portion, of the valuation allowance would result in the recognition of certain deferred tax assets and a decrease to income tax expense for the period the release is recorded.