2023 Washington Code 28A.150.400 – Apportionment factors to be based on current figures — Rules and regulations

2022 Washington Code 28A.150.400 – Apportionment factors to be based on current figures–Rules and regulations

2020 Washington Code 28A.150.400 – Apportionment factors to be based on current figures — Rules and regulations

2019 Washington Code 28A.150.400 – Apportionment factors to be based on current figures — Rules and regulations

2018 Washington Code 28A.150.400 – Apportionment factors to be based on current figures — Rules and regulations

2016 Washington Code 28A.150.400 – Apportionment factors to be based on current figures–Rules and regulations

2015 Washington Code 28A.150.400 – Apportionment factors to be based on current figures–Rules and regulations

2014 Washington Code 28A.150.400 – Apportionment factors to be based on current figures — Rules and regulations

2013 Washington Code 28A.150.400 – Apportionment factors to be based on current figures — Rules and regulations

2009 Washington Code 28A.150.400 – Apportionment factors to be based on current figures — Rules and regulations