The non-resident population of Singapore has increased significantly in the last decade. Due to this, the number of PR applicants in the last few years has also increased. However, the number of PR applications getting approved is fixed at about 30,000 yearly (Which was around 80000 in 2008). Therefore, the competition has increased while the vacant spots remain limited every year. It shows that getting PR is not as easy as it used to be. However, you can engage professional assistance to work on your profile and help with your PR application to boost your chances of success.
Refer to this below table. It compares the approvals vs applicants in year 2008 vs 2020. As you can see the ratio of applicants compared to approvals has gone up significantly.