Table 5 Regional distributions of publications
Country | the USA | China | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Period Num. | 2008–2017 1031 | 2008–2012 269 | 2013–2017 762 | 2008–2017 173 | 2008–2012 38 | 2013–2017 135 | ||||||
Rank | Region | Num. | Region | Num. | Region | Num. | Region | Num. | Region | Num. | Region | Num. |
1 | Massachusetts | 211 | New York | 45 | Massachusetts | 169 | Taiwan | 47 | Taiwan | 15 | Beijing | 38 |
2 | New York | 173 | Massachusetts | 42 | California | 129 | Beijing | 46 | Beijing | 8 | Taiwan | 32 |
3 | California | 161 | Minnesota | 37 | New York | 128 | Guangdong | 22 | Hong Kong | 3 | Guangdong | 21 |
4 | Minnesota | 122 | Tennessee | 36 | Minnesota | 85 | Shanghai | 17 | Sichuan | 3 | Shanghai | 16 |
5 | Tennessee | 102 | California | 32 | Pennsylvania | 81 | Zhejiang | 16 | Zhejiang | 3 | Zhejiang | 13 |
6 | Pennsylvania | 98 | Utah | 27 | Texas | 68 | Jiangsu | 11 | Heilongjiang | 2 | Jiangsu | 10 |
7 | Utah | 90 | Maryland | 17 | Tennessee | 66 | Heilongjiang | 9 | Macau | 2 | Hubei | 8 |
8 | Maryland | 81 | Pennsylvania | 17 | Maryland | 64 | Hubei | 8 | Chongqing | 1 | Heilongjiang | 7 |
9 | Texas | 78 | Washington | 16 | Utah | 63 | Chongqing | 7 | Gansu | 1 | Chongqing | 6 |
10 | Washington | 72 | Indiana | 14 | Washington | 56 | Sichuan | 7 | Guangdong | 1 | Henan | 5 |
11 | Illinois | 51 | Wisconsin | 13 | Ohio | 42 | Hong Kong | 6 | Jiangsu | 1 | Macau | 4 |
12 | Indiana | 45 | Illinois | 11 | Illinois | 40 | Macau | 6 | Shaanxi | 1 | Sichuan | 4 |
13 | Ohio | 45 | Florida | 10 | Indiana | 31 | Henan | 5 | Shandong | 1 | Hong Kong | 3 |
14 | Michigan | 38 | Michigan | 10 | Michigan | 28 | Shaanxi | 4 | Shanghai | 1 | Jilin | 3 |