I have 2 proportions from 2 years:

P1(2001): 11000/12500 = 88.0%

P2 (2002): 11500/12800 = 89.8%

I am interested in knowing if there is a statistical increase in % from 2001 to 2002. So, H0 = P1-P2>0; H1 = P1-P2 < 0

I had applied z-test to this problem and it gave a significant result. Is this true?