According to the article: "...will take the $10 minimum hourly wage to $11 by December 2018, $12 by March 2019 and $13 by September 2019. Minimum pay will then increase to $14 in 2020 and $15 in 2021."
So we are seeing a $3 increase for 2019 that is translating to a 4-5% extra increase in the annual dues (since we already typically see a 4-5% increase without the wage bump. The $3 increase represents a 30% increase from the previous wage.
The 2020 $1 increase from $13 to $14 is a 7.7% increase.
Since a 30% increase resulted in a 4-5% bump, I would expect the 7.7% increase to be about a 1% bump over normal year-to-year dues increases (so 5%-6% rather than the usual 4%-5%).
2021 should be similar.
Shall we start a pool to see what they will be next year ?