Statistics: Tunnelling and Underground Space Technology

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Geo Map
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Region #
AS - Asia, other 65
NA - North America 28
EU - Europe 5
Unknown 2
Total 100
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Country #
SG - Singapore 64
US - United States of America 28
IE - Ireland 2
RU - Russian Federation 2
BD - Bangladesh 1
DE - Germany 1
Unknown 2
Total 100
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City #
Dublin 2
Moscow 1
Santa Clara 1
Unknown 96
Total 100
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Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Tot
2021 00 0000 0100 00 1
2022 00 0000 0001 01 2
2023 00 0110 1071 40 15
2024 12 0110 1040 00 10
2025 00 30614 2002 00 72
Ever 100