Every state treats alimony differently. In Texas, for example, the marriage must last ten years for any alimony to be awarded. In Wisconsin, by contrast, if it is a 20 year marriage, the presumption begins with an equalization of income. You add his to hers and divide by two.
Most states, however, award maintenance depending on the particular circumstances of the case. It makes it very difficult to predict. Spousal maintenance awards are generally granted if the spouse seeking maintenance demonstrates that he or she:
(1) lacks sufficient property, including marital property apportioned as part of the divorce to provide for the reasonable needs of the spouse considering the standard of living established during the marriage, especially, but not limited to, a period of training or education; or
(2) is unable to provide adequate self-support, after considering the standard of living established during the marriage and all relevant circumstance, through appropriate employment, or
(3) is the custodian of a child whose condition and circumstances make it appropriate that the custodian not be required to seek employment outside the home.
In determining the amount and duration of spousal maintenance, state statutes require that Courts address all relevant factors. Most statutes also specifically identify specific issues that should be considered in determining awards of spousal maintenance:
(1) The financial resources of the spouse seeking maintenance;
(2) The amount of time that is necessary for the spouse seeking maintenance to acquire necessary skills or education to find appropriate employment;
(3) The age and physical and emotional health of the recipient spouse;
(4) The standard of living established during the marriage;
(5) The length of the marriage;
(6) The contribution and economic sacrifices of a homemaker including loss of seniority, retirement benefits and other employment opportunities foregone while working at home
(7) The financial resources available to the spouse from whom maintenance is sought.
I don't think anyone here has sufficient information to tell you whether you are entitled to any spousal support, let alone permanent spousal support, without many more facts.