Sure,
One of the parts of proving a bonified marriage is to show commingling of finances, combining income together and showing you are paying expenses with that combined income.
The most straightforward way to show this is to have a shared checking account and each of you deposit money into the account each month (direct deposit from pay) and show paying your monthly bills each month. So, if you can provide monthly bank statements for each month during the marriage showing the deposits and expenses is the best proof.
If one partner has income you can still show, as best you can, that the partner with income is paying for joint expenses from bank statements.
If you have separate accounts, you can show that each of you is paying shared expenses separately i.e. one pays the rent, the other pay the home energy bill and so on, each month during the marriage from bank statements from each account.
If you have joint saving you can show monthly statements for that account as well.
If you have joint/shared credit cards you can show monthly statements from that account.
Use any or all of your monthly financial statements to show how you and your partner support one another financially during your marriage.