And which ones experienced the largest percent decreases in unique pageviews?

pageurl percent_change_pageviews unique_pageviews_2020 unique_pageviews_2019
/services/request/borrow-direct 19.0 65 342
/libraries/mann 20.7 50 242
/libraries/annex 21.7 23 106
/libraries/math 21.9 25 114
/libraries/olin 27.5 130 472
/services/spaces 31.0 31 100
/libraries/uris 31.9 91 285
/libraries 33.1 656 1982
/libraries/engineering 33.7 33 98
/libraries/finearts 35.5 27 76
/about/inside/mission 40.4 40 99
/web-accessibility 43.3 65 150
/about/inside/departments 43.5 27 62
/nr/bookcpdf.html 48.3 28 58
/about/visit/privileges 51.4 37 72
/about/visit 52.1 50 96
/about/staff 52.7 116 220
/services/borrow/return 54.5 24 44
/okuref/research/skill28.htm 56.1 23 41
/services/request 56.2 140 249
/libraries/vet 59.5 100 168
/libraries/ilr 59.6 53 89
/about/staff/library-executive-group 64.6 51 79
/about/inside 67.6 73 108
/about/staff/university-librarian 67.9 72 106
/about 68.4 180 263
/services/disability 69.4 25 36
/libraries/africana 70.3 64 91
/about/news/stories 71.4 30 42
/services/instruction/workshops 74.4 32 43
/services/request/interlibrary-loan 74.6 138 185
/research/current-awareness 74.6 47 63
/services/borrow 76.4 97 127
/research/introduction 77.2 468 606
/services/borrow/staff 77.4 24 31
/ask/directory 78.8 52 66
/about/partnerships 78.9 30 38
/about/collections/special 80.0 60 75
/about/collections/coap 80.0 40 50
/services/instruction 80.4 37 46
/services/liaisons 83.6 51 61
/services/request/scan-it 86.4 57 66
/about/collections/selectors 88.4 61 69
/help 89.1 49 55
/search/node 89.7 70 78
/research/citation 92.8 3585 3863
/about/collections 93.4 169 181
/services/digitization 93.8 30 32
/research 95.8 228 238
/research/introduction/dissertations 99.1 225 227

An alternative way of viewing the change in popularity is to create a top 100 ranking (by unique pageviews) for pages that appeared in both years.

pageurl top100rank_2020 top100rank_2019 top100change unique_pageviews_2020 unique_pageviews_2019
/research/citation 1 1 0 3585 3863
/services/apps/passkey 3 19 16 897 222
/ask 4 5 1 700 698
/libraries 5 4 -1 656 1982
/research/introduction 8 6 -2 468 606
/reserves/tools/linking 9 26 17 438 130
/libraries/law 10 50 40 408 76
/libraries/jgsm 11 36 25 360 105
/research/citation/tutorial 12 10 -2 356 274
/research/introduction/articles 13 11 -2 334 269
/arxiv 14 13 -1 289 262
/services/overdrive 15 43 28 286 85
/services/request/recommend 16 52 36 264 75
/ask/email 17 29 12 237 123
/help/catalog 18 28 10 230 124
/research 19 16 -3 228 238
/research/introduction/dissertations 20 18 -2 225 227
/about 21 12 -9 180 263
/about/collections 22 22 0 169 181
/reserves 23 30 7 157 120
/services 24 25 1 145 142
/services/request 25 14 -11 140 249
/services/request/interlibrary-loan 26 21 -5 138 185
/libraries/olin 27 7 -20 130 472
/about/staff 28 20 -8 116 220
/about/collections/visual-resources 29 46 17 108 81
/research/consultation 30 45 15 106 83
/libraries/vet 31 23 -8 100 168
/services/borrow 32 27 -5 97 127
/libraries/uris 33 9 -24 91 285
/services/apps 34 81 47 77 41
/about/inside 35 33 -2 73 108
/about/staff/university-librarian 36 34 -2 72 106
/search/node 38 48 10 70 78
/about/policies/public-domain 39 59 20 65 64
/services/request/borrow-direct 40 8 -32 65 342
/web-accessibility 41 24 -17 65 150
/libraries/africana 43 41 -2 64 91
/about/collections/selectors 44 54 10 61 69
/about/collections/special 45 51 6 60 75
/services/request/scan-it 47 56 9 57 66
/libraries/ilr 50 42 -8 53 89
/ask/directory 51 55 4 52 66
/about/staff/library-executive-group 52 47 -5 51 79
/services/liaisons 53 62 9 51 61
/about/visit 54 40 -14 50 96
/libraries/mann 55 15 -40 50 242
/about/events/booktalks 56 85 29 49 36
/help 57 64 7 49 55
/research/citation/code 58 72 14 49 46
/research/current-awareness 59 60 1 47 63
/okuref/research/skill26.htm 60 84 24 46 37
/about/events 62 95 33 45 31
/services/scholarly 65 93 28 42 33
/about/collections/coap 66 67 1 40 50
/about/inside/mission 67 38 -29 40 99
/about/policies 70 86 16 38 36
/about/visit/privileges 72 53 -19 37 72
/services/instruction 73 73 0 37 46
/nr/cbookcpdf.html 76 92 16 36 34
/libraries/engineering 77 39 -38 33 98
/services/instruction/workshops 79 75 -4 32 43
/services/spaces 81 37 -44 31 100
/about/news/stories 83 77 -6 30 42
/about/partnerships 84 83 -1 30 38
/services/digitization 86 94 8 30 32
/nr/bookcpdf.html 87 63 -24 28 58
/about/inside/departments 88 61 -27 27 62
/libraries/finearts 89 49 -40 27 76
/libraries/math 93 32 -61 25 114
/services/disability 94 88 -6 25 36
/services/borrow/return 96 74 -22 24 44
/services/borrow/staff 97 99 2 24 31
/libraries/annex 99 35 -64 23 106
/okuref/research/skill28.htm 100 80 -20 23 41

Pages that jumped most in the popularity ranking

Pages that dropped most in the popularity ranking

What is the correlation between top100change in relative populatity of page and the percent change in unique page views?

## [1] 0.6669618

Which metric is more informative, unique pageview change (percent_change_pageviews ) or page popularity rank change (top100change)?