16. Commitments and Contingencies The Company leases facilities under non-cancelable operating leases, which expire on various dates through January 2029, with lease expense aggregating $5,384, $5,440, and $5,548 in fiscal 2019, 2018 and 2017, respectively. The Company also has non-cancelable operating leases for transportation, computer and office equipment, which expire at various dates. Lease expense for fiscal 2019, 2018 and 2017 aggregated $1,788, $1,721 and $1,656, respectively. Certain of the above leases are renewable while none contain material contingent rent or concession clauses. The aggregate future minimum lease payments under operating leases are as follows: 2020 $ 5,317 2021 4,280 2022 2,885 2023 1,863 2024 1,031 2025 and thereafter 2,593 As of March 30, 2019, approximately 7.7% of the Companys hourly employees in the U.S. and abroad were represented by labor unions. The Company enters into government contracts and subcontracts that are subject to audit by the government. In the opinion of the Companys management, the results of such audits, if any, are not expected to have a material impact on the cash flows, financial condition or results of operations of the Company. For fiscal 2019, 2018 and 2017, there were no audits by the government, the results of which, in the opinion of the Companys management, had a material impact on the cash flows, financial condition or results of operations of the Company. The Company is subject to federal, state and local environmental laws and regulations, including those governing discharges of pollutants into the air and water, the storage, handling and disposal of wastes and the health and safety of employees. The Company also may be liable under the Comprehensive Environmental Response, Compensation, and Liability Act or similar state laws for the costs of investigation and cleanup of contamination at facilities currently or formerly owned or operated by the Company, or at other facilities at which the Company may have disposed of hazardous substances. In connection with such contamination, the Company may also be liable for natural resource damages, government penalties and claims by third parties for personal injury and property damage. Agencies responsible for enforcing these laws have authority to impose significant civil or criminal penalties for non-compliance. The Company believes it is currently in material compliance with all applicable requirements of environmental laws. The Company does not anticipate material capital expenditures for environmental compliance in fiscal years 2020 or 2021. Investigation and remediation of contamination is ongoing at some of the Companys sites. In particular, state agencies have been overseeing groundwater monitoring activities at the Companys facility in Hartsville, South Carolina and a corrective action plan at the Companys facility in Clayton, Georgia. At Hartsville, the Company is monitoring low levels of contaminants in the groundwater caused by former operations. Plans are currently underway to conclude remediation and monitoring activities. In connection with the purchase of the Fairfield, Connecticut facility in 1996, the Company agreed to assume responsibility for completing clean-up efforts previously initiated by the prior owner. The Company submitted data to the state that the Company believes demonstrates that no further remedial action is necessary, although the state may require additional clean-up or monitoring. In connection with the purchase of the Companys Clayton, Georgia facility, the Company agreed to take assignment of the hazardous waste permit covering such facility and to assume certain responsibilities to implement a corrective action plan concerning the remediation of certain soil and groundwater contamination present at that facility. The corrective action plan is ongoing. Although there can be no assurance, the Company does not expect the costs associated with the above sites to be material. From time to time, we are involved in litigation and administrative proceedings which arise in the ordinary course of our business. We do not believe that any litigation or proceeding in which we are currently involved, either individually or in the aggregate, is likely to have a material adverse effect on our business, financial condition, operating results, cash flow or prospects.