9.3(top 2%)
impact factor
152.0K(top 0.1%)
papers
18.6M(top 0.1%)
citations
1.0K(top 0.1%)
h-index
9.5(top 2%)
impact factor
161.5K
all documents
19.8M
doc citations
1.6K(top 0.1%)
g-index
impact-factor
The graph shows the changes in the impact factor of Proceedings of the National Academy of Sciences of the United States of America and its corresponding percentile for the sake of comparison with the entire literature. Impact Factor is the most common scientometric index, which is defined by the number of citations of papers in two preceding years divided by the number of papers published in those years.